English: Historical drawings of several modern crocodile species. Note that number 1 is actually the American alligator (Alligator mississippiensis, here referred to as “Kaiman” and Alligator lucius, respectively).
Deutsch: Historische Zeichnungen mehrerer rezenter Krokodilarten. Man beachte, dass die Nummer 1 tatsächlich der Mississippi-Alligator (Alligator mississippiensis) ist (hier bezeichnet als „Kaiman“ bzw. als Alligator lucius).
Date 1907
Source Meyers Großes Konversationslexikon. 6. Auflage, Leipzig 1907 (Digitalisat: Zeno.org, ID number 20007740131)
Author Friedrich Specht
Source: https://commons.wikimedia.org/wiki/File:Krokodile.png

1. Kaiman (Alligator lucius). = American alligator (Alligator mississippiensis)
2. Nilkrokodil (Crocodilus niloticus). = Nile crocodile (Crocodylus niloticus)
3. Leistenkrokodil (Crocodilus porosus). = saltwater crocodile (Crocodylus porosus)
4. Gavial (Gavialis gangeticus). = gharial (Gavialis gangeticus)

The American alligator (Alligator mississippiensis), also known as gator or common alligator, is a large crocodilian reptile endemic to the southeastern United States.

The Nile crocodile (Crocodylus niloticus) is an African crocodile widespread throughout Sub-Saharan Africa, occurring mostly in the central, eastern, and southern regions of the continent and lives in different types of aquatic environments such as lakes, rivers and marshlands.

The saltwater crocodile (Crocodylus porosus), also known as the estuarine crocodile, Indo-Pacific crocodile, marine crocodile, sea crocodile or informally as saltie, is the largest of all living reptiles, as well as the largest riparian predator in the world.

The gharial (Gavialis gangeticus), also known as the gavial, and the fish-eating crocodile, is a crocodilian of the family Gavialidae, native to the northern part of the Indian Subcontinent.