1. Body of alligator measures two and half to three and a half meters in length and is covered with an exoskeleton of horny epidermal scutes over bony scutes.
2. The general color is greenish-black or dark-brown above and yellowish below.
3. Head is broad with short, broad and rounded snout having nostrils at the tip. Head bears eye with movable eyelids and ear opening provided with movable flaps of skin.
4. Limbs Pentadactyl with 5 fingers add 4 toes with webs.
5. The tail is long and laterally composed.
6. Mandibular is short and extending only to the level of 4 th and 5 th tooth.
7. On the either side 17-20 teeth in the upper jaw and 18-20 teeth in the lower jaw.
8. The nasal bones divide the nasal groove by the median bony septum.
9. Heart is four chambered and urinary bladder is absent.
10. Alligator is found in the rivers of southern States of North America.
Source:
1. Practical Zoology Vertebrates by S.S.Lal. 2. A Manual of Practical Zoology Chordates by Dr. P.S. Verma.
