3. CROCODILUS. 281 



4. Crocodilus americanus. 



Schneid. Ilkt. Ainph. ii. p. 23 (18UlJ j Geoil'r. Ann. Mm. ii. pi. xxxvii. 

 fig. 1 (1803). 



Crocodilus americanus, Lanr. Syn. Bept. p. 54 (1708) ; Gray, Cat. 

 Tort. K^-c. p. 60 (1844) ; JIuxley, Joxirn. Linn. Sue. iv, p. 11 

 (18G0) ; Hocourt, Miss. ' Sc. Mex., Itept. p. 30, pi. viii. fig. 1, & 

 pi. ix. lig. 1 (1870) ; Giinth. Biol. C.-Am., Bept. p. 19 (1885). 



acutus, Cuv. Ann. Mus. x. p. 55, pis. i. & ii. (1807) ; Geoff): Aim. 



Mm. X. p. 70 (1807) ; Ticrlem., 0pp., <^- Lib. Nat. Amph. p. 78, 

 pi. xiii. (1817) ; Bum. ^- Bihr. iii. p. Hi) (1830); Cocf. inB.de la 

 Sayra,L£ist. Cuba, Bept. p. Oi*, pi. v. (1843) ; Strauch, &'i/n. Crocod. 

 pp. 50 &• 102 (1800) ; Wyman, Amer. Journ. xlix. p. 105 (1870). 



biscutatus, Cuv. I. c. p. 53, pi. ii. tig. ; Tiedem., 0pp., ^- lAh. 



op. cit. p. 77, pi. xli. 



Molinia amoricana, Gray, Ann. !<>• May. N. IL (3) x. p. 272 (1802), 

 and Trans. Zool. Sac. vi. p. 150 (1807), and Cat. SIi. Bept. ii. 

 p. 17 (1872). 



Crocodilus pacificus, Bocoiirt, I. c. p. 31, pi. ix. fig. 5. 



lewyanus, Bocourt, I. c. p. 33, pi. viii. fig. 2. 



mexicauus, Bocourt, I. c. p. 34, pi. viii. fig. 3. 



18 or 19 upper teeth ou each side. Snout variable in length, 

 once and three fifths to twice and one fourth as long as broad at 

 the base ; a median ridge or longitudinal swelling along the snout ; 

 mandibular symphysis extending to the fourth or fifth tooth ; pra?- 

 • maxillo-maxillary suture, on the palate, directed backwards ; maxil- 

 laries forming a short median suture above, or narrowly separated 

 by the nasals. Usually four large nuchals forming a square, with a 

 smaller one ou each side of the anterior pair ; the large nuchals 

 sometimes followed by one or two detached pairs of smaller scutes ; 

 usually two pairs of smaller nuchals in a transverse row behind the 

 occiput. Dorsal scutes well separated from the nuchals, in 15 or 

 IG transverse and four or six longitudinal rows ; the scutes of the 

 two median rows regularly arranged, the others more or less 

 irregular and more strongly keeled ; sides with scattered keeled 

 scutes. A slight web between the second and third fingers ; outer 

 toes extensively webbed. A serrated fringe on the outer edge of 

 the leg ; scales on the limbs keeled. Blackish olive above, yellowish 

 inferiorly ; young pale olive, dotted and spotted with black. 



The largest specimen in the Collection measures 3^ metres. 



Ecuador, Colombia, Venezuela, Central America, West Indies, 

 Florida. 



a. Yg., spir. W. Ecuador. Mr. Eraser [C.]. 



b. Yg., skiu. Chepo, Panama. 0. Salvin, Ksq. [C.]. 



c. Ad., stfill. San .Juande Nicaragua. G. R. Williams, Esq. 



[P.]. 



d. Yg., spir. Nicaragua. Sir J. Richardson [P.]. 



e. Hgi-., stftcl. Guatemala. O. Salviu, Esq. [C] 

 /. Yg., stffd. Tapaua, Tehuautepec. F. Sumichrast [C.]. 

 ff. Yg., spir. Mazatlan. Mr. Forrer [0.]. 



//, i. Yg., skins. Presidio. Mr. Forrer [C.]. 



