60 REPTILES. 



■** Dorsal plates 6-rowed, the middle ones square, the side ones ob- 

 long, longer than broad, in equal series, the smaller plates on the 

 sides in two longitudinal and nearly parallel series. Nuchal 

 shields small. Muzzle convex, with 2 short diverging ridges in 

 front. Tropical America. Palinia. 



The Aque Palin, (Hernand). Crocodilus rhombifer, Cuv. Ann. 

 Mus. x. 51. Oss. Foss. v. t. S,f. 1 — 4. Tiedem. Amph. 75, t. 10. 

 Gray, Syn. 59. Dum. et Bib. E. G. iii. 97. Sagra, H. Cuba, t. 4. 



Nape with small nuchal plates ; cervical plates 6, four iu the 

 front row and two behind ; scales of the sides of the neck and bo- 

 dy tuberculose in the middle ; the forehead with divergent sides, 

 half as wide again as the muzzle at the front notch ; muzzle con- 

 vex, with two short diverging ridges in front of the eyes, at the 9th 

 tooth one third as wide again as at the anterior notch, and two 

 thirds the width of the spa.ce between the eyes and nose ; scales of 

 the middle of the back 6-rowed, square, close, of the sides oblong, 

 square, the smaller plates on the sides in 2 short longitudinal series. 



a. Stuffed, half grown. Cuba. From the Museum of the Jardin 

 des Plantes, Paris. Sent there by M. Sagra. 



*** Dorsal plates square, as broad as long, the lateral dorsal series 

 irregular, scattered. Nuchal and cervical plates variable. — 

 Muzzle narrow, ridgeless ; forehead of adult convex. Tropical 

 America. Motinia. 



The American Crocodile. Crocodilus Americanus (Plumi- 

 eri), Schneid. Amph. 167. Seba, i. t. 106,/. 1. C. acutus, Geoff. 

 Ann. Mus. ii. 53, t. 57, f. 1 , x. 67. Cuv. Ann. Mus. x. Oss. Fos. 

 v. t. 1,/. 3—14, t. 2,f. 5. Gray, Syn. 60. Dum. et Bib. E. G. iii. 

 120. C. biscutatus, Cuv. Ann. Mus. x. S>- Oss. Foss. x, t. 2, f. 6. 

 Tiedem. Amph. t. 12. La fouette queue, Lacep. Hist. Q. O. i. 240. 



Muzzle slender, smooth, without any ridges in front of the 

 eyes, rather swollen, convex, and rounded in the adult ; dorsal 

 shield square, 4-rowed ; the lateral ones irregular and highest. 



a, Stuffed, half grown. Length 31 inches. Trop. America. Mr. 

 Warwick's collection. 



b, g. In spirits, young. Length 12 inches. Dr. Mantell's collec- 



tion. 



c, d. In spirits, young. Length 18 inches. Cuba. Presented by 



W. S. MacLeay, Esq. 



e. Skull and front part of back of adult. Nuchal shields 2 pair, 

 in an arch ; cervical shields 6, in a roundish group with 2 

 smaller ones between the group and the dorsal shield ; fore- 

 head very convex. West coast of America. Presented by 

 Capt. Sir Edward Belcher, R.N., C.B. 



/. Skull of young. From Dr. Mantell's collection. 



