CROCODILUS. 59 



The back has 6 longitudinal series of quadrate shields ; 

 dark olive with small dark brown specks ; the forehead con- 

 vex and hemispherical ; the muzzle is convex with two 

 converging ridges ; the neck has 6 cervical plates, and the 

 limbs are covered with thick keeled scales. 



4. Cj'oc. liscutatus, {Double-shielded Crocodile.) Rostro 

 subconvexo, scutis nuclise cervicisque 2, dorsi intermediis 

 quadratis, exterioribus irregularibus subsparsis. 



Croc, carinatus? Sch. Cr, liscutatus, Cuv. Ann. Mus. 

 X. t. 2, f. 6, et Os. Fos. v. t. 2,J. 6. Crocodile noire, Adan- 

 son, 72 ? 



Habit, in Africa Orientali ; Senegal, Adanson ? 



The beak rather convex, the back with six rows of shields, 

 the two middle ones square and approximate, the outer 

 ones irregular and rather scattered, the nuchal shields pyra- 

 midical, the cervical ones 2, smaller, the back with only 15 

 cross rows of shields to the back of the thigh, and the 

 double crest of the tail reachinsr to the seventeenth range of 

 plates. Cuvier has only seen two specimens of this species, 

 one from Adanson's collection. 



5. Croc, cataphractus [Armoiired Crocodile.) Rostro pro- 

 ductiore, scutis cervicis fasciis 4 2-scutatis cum scutellis 

 dorsi connexis. 



Croc, cataphractus, Cuv. Os. Fos. v. t. 5, f. 1. (v. Mus. 

 Col. Surg.) 



Hab. ^ 



Head five times as long as broad, teeth W, nuchal shields 6, 

 oval, isolated, in two rows, the first of 2 and second of 4 plates; 

 the cervical shields 5 pairs, square, united to the dorsal ones, 

 the first pair large, gradually diminishing; the dorsal shields 

 square, 6-rowed, highly keeled and broader than long. 



6. Croc, playiirostris (Flat-headed Croco^^iZe.) Rostro sequali 

 ad basin piano, scutis omnibus tuberculosis, dorsi quinque- 

 sexfariam dispositis, nuchae 4, cervicis 6 distantibus, pedibus 

 cristatis. 



Croc, planirostris. Graves Ann. Sci. ii. 348, (Mus. 

 Bordeaux.) Croc. Gravesii, Bory St. Vincent Diet. CI. H. N. 

 Hab. in Africa ? fluvio Congo ? 

 Muzzle square, flat at the base. 



7. Croc, intermedius, (Intermediate Crocodile.) Rostro 



