Well, Race Bannon only needed three shots from a rocket launcher to bring down Turu the Pterrible Pteranodon…but he’s *Race Bannon, *after all.
Yes, AFAIK, several animal neurotoxins come to mind, like some snake venoms. The dosage would just have to be big. Plus you have your arsenics and cyanides, all readily available at the time.
The Bushmen use the extract of beetle grubs, but theirs usually takes a while to take effect. So, useful for hunting, but not for self defense.
Maybe you could bring in Lyon Playfair or Fritz Haber to consult? The former proposed “cacodyl cyanide” for use in shells during the Crimean War, and the latter would have been on a university faculty in 1895—maybe you could get him during the summer break. 
I don’t, however, know what effect certain chemical agents would have on the meat of the dinosaur, which might something you’d have to consider. Even leaving aside the issue of how to erect an enormous roasting spit in the field, or how many men you’d need to turn it, or apply the giant decorative chop frills to the stubs of the leg bones.
Frankly, he should have only needed one. Pteranodons weren’t exactly built like tanks…
Speaking of dactyls, could a man kill one that has landed through kicks and punches?
Depends on the pterosaur in question, I’d imagine. Most would probably not put up with such and would just take off (contrary to the way they are often presented in films, they were not completely helpless on the ground). For some of the larger ones, it might be conceivable, but still pretty dangerous; trying to subdue a critter the size of a small plane with punches is probably not a recipe for long life.
But scaring one off is possible? After all, if a man punches a hole through one of the wings, the Pterodactyl is pretty much doomed, right?
Sure, they can be scared off. But it’s pretty unlikely you’d be able to punch a hole in the wing. They’re pretty flexible, as well as tough.
Probably.
Those things had hollow bones and were light as box kites. But they were probably tough too. Tough but fragile. They might take a suprising amount of abuse up to a certain point. But one broken bone or dislocated joint or torn membrane and they’re finished, because if they can’t fly they can’t feed. But they might be able to put up a heck of a fight even though they’re doomed afterwards.
My first question is how is this presented to the guys who are picking out the weapons? Are you telling them in advance that they are hunting dinosaurs or are you just saying this is a “scientific expedition” and be prepared for some big game, just in case? If it’s the latter, you are going to be woefully under armed. The nitro express is a good choice. It’s going to be new and fancy, and has good penetration compared to other rifles of the time. Most of the guys will be carrying much less capable rifles though. They’ll be more than adequately armed to go on an African safari, but they are going to have trouble taking down dinosaurs.
There’s a video floating around the net of police taking down an elephant that had killed two of its trainers and was starting to go on a rampage through the town. They didn’t have an elephant gun either. They just shot the bejeezus out of it with what guns they had. It took a while, but eventually it went down. I suspect your dino hunters will end up using the same tactics.
If you tell them ahead of time that they are hunting dinos though I imagine they are going to be bringing along quite a few 2 gauge elephant guns and the like. Depending on where you shoot the dino, though, the nitro express may end up being more effective. The lead ball from an 1895 elephant gun isn’t going to go through the skull of most big dinos. I’d be half tempted to bring along a few small cannons and some chain shot too, as was already suggested.
I suspect that a pterosaur would probably beat the snot out of a man on the ground. Think about how much damage a pissed off bald eagle could do to you if you got into a scrape with one, then scale that up to pterosaur size. While Mr. Pterosaur is getting medieval (er, cretaceous, maybe) on your ass, your best defense (with 1895 weapons and assuming you can’t grab your rifle in time) is probably to pull that Colt revolver that you keep for emergencies out of your belt and fire a couple of shots into the pterosaur. You probably won’t kill him, but the sound and pain will probably be enough to discourage him from continuing the attack.
If you don’t want to use a pistol, punch the pterosaur in the eye. That will discourage a lot of animals that would otherwise find humans to be tasty and good with ketchup.
I’d say a machete is a good backup for your pterosaurs. Also for smaller dinos you might not want to waste ammo on.
And what will you do when the T-rex shows up in one of these?
Easier said than done, in some cases.
I always forget about that one…
Could one of those lift a human? Or eat one? And if they ate one, could they fly with the added weight?
Oooh. Nice quetzalcoatlus. (But shouldn’t it have a nice naked head, like a condor?)
I don’t recall that they’ve been determined to be scavengers, so I do 't know that they would have been bald. Pterosaurs in general did have furry-type integument, so the furry look seems appropriate.
I have trouble envisioning the critters as anything other than scavengers, which is probably an indication of the extent of imagination, and my lack of reading anything about the critters in at least ten years.
The limb proportions are interesting, and a stork-analogue niche makes sense.
As noted in the Wikipedia article, the latest research indicates
Quetzalcoatlus, of course, being an azhdarchid pterosaur.
I am never going to use that term, as it is ugly, and impossible for even Wikipedians to spell properly.