28 NEW-YORK FAUNA. 



G. neocesariensis. (Plate 22, fig. 59.) With from fifteen to eighteen distant, conical teeth. Length 

 9-10 feet. 



Genus Mosasaurus, Conybeare. Teeth smooth, with two sharp crests, elevated from the jaw by an 

 osseous support, pyramidal, slightly recurved, 12 - 15 on each side above and below. 

 This genus was first indicated by Cuvier, and the name impo?ed by Conybeare on a huge fossil 

 aquatic reptile, long known in the books under the name of "the Animal of Maastricht." It was 

 treated by various naturalists as a crocodile, a fish, or as a cetaceous animal. In this country, I am 

 acquainted with but two localities of this fossil genus. Consult Mitchill, N. Y. Ed. of Cuvier's 

 Theory of the Earth; Harlan, Ac. Sc. Vol. 4, p. 235, pi. 14; De Kay, Ann. Lye. Vol. 3, p. 

 135. 



M. major. (Plate 22, figs. 57, 58.) Closely allied to the typical species. 14 - 15 feet long. New- 

 Jersey, Alabama. 



Genus Geosaurus, Cuvier. Teeth resembling the preceding in their system of dentition, but com- 

 pressed, and divided by sharp indistinctly serrated edges into two surfaces, each of which are 

 subdivided into 4-5 facets. 



This group of large fossil reptiles has also a representative in this country. It is from the 

 greensand of New-Jersey, and fragments of its remains have been described and figured by me, in 

 the Annals of the Lyceum, Vol. 3, p. 138. 

 G. mitchilli. (Plate 22, fig. 59.) Fifteen to twenty feet long. 



FAMILY IGUANID.E. 



Small. Tongue short and thick. Teeth in the palate. Scales on the abdomen not imbricated. Tail 

 long and slender. 



Genus Anolius, Cuvier. Head elongated. Jaws and palate with small sharp notched teeth. Tongue 



soft, fleshy, neither cleft nor extensile. Body with minute scales. Tail cylindrical, very long, 



verticillate. Skin on the penultimate joints of the fingers and toes extending into an oval disk, 



transversely striate. 



A. carolinensis. (Holbrook, Vol. 2, pi. 8.) Head flattened, and covered with minute scales ; nostrils 



distant from the end of the snout ; a dilatable sac under the throat. Tail nearly twice the length 



of the body. Length 6-8 inches. 



FAMILY SCINCIDM. 



All the scales on the body and tail smooth, shming, equal, imbricated. Feet two to four; and 

 with the toes very short, sometimes rudimentary. Tongue scarcely retractile. No gular 

 pouch. 



Obs. Of this family, we know at present four living species in the United States, one of 

 which extends to our State, and even farther east. 



