20 CROCODILIA. 
Variations in the form of the head in Crocodilus americanus. 
acutus, Cuv., =pacificus, Boe. moreletit, Dum., =meaicanus, Boc. 
rms in 
Hab. Size. Fengtit - of oh Hab. Size. in git nenated 
of head. of head. 
in. in. 
a. Jamaica ...... 10 13 1: 3h 
6. Nicaragua...... 11 13 1: 3} 
c. Mazatlan ...... 14 2h 1: 33 
d. West Ecuador ..| 20 31 1:44 
e. Jamaica ...... 28 41 1:4 on. in. 
f. Chepo ........ 28 5 1:44 a. Mexico ........ 294 4 1: 32 
g. Tehuantepec....; 29 4 1:4 b. Mexico ........ 324 41 1: 32 
h. Presidio ...... 37 6 1:41 c. Mexico ........ 38 5 1:3} 
4. Presidio ...... 43 7 1:4, || d. Mexico ........ 421 54 1:3) 
k. Guatemala ....| 57 9 1:44 
1. Jamaica ...... 93 14 1:4 
? eee 103 15 1: 33 
n. 2 eee 105 16 1: 32 
o. Paeifie Coast.... ? 17 1: 35% 
p. Greytown ...... 1334 194 1: 3h e. Mexico ........ ? 20 1: 24 
a. Crocodilus americanus, var. acutus. 
Crocodilus americanus plumieri, Schneid. Hist. Amph. fasc. 2, p. 167. 
Le Crocodile de Saint-Domingue, Geoffr. Ann. Mus. Hist. Nat. ii. 1808, p. 53, t. 87. fig. 1; 
Descourtilz, Voy. d’un Naturaliste, vol. iii. 1809, p. 11 et seqq. pls. 2-5. 
Crocodilus acutus, Cuv. Ann. Mus. Hist. Nat. x. 1807, p. 55, t. 1. figs. 8 & 14, t. 2. fig.5; Geoffr. 
ibid. p. 79; Dum. & Bibr. Erpét. génér. iii. p. 119; Ramon de la Sagra, Cuba, Rept. p. 62, 
t. 5. 
Crocodilus biscutatus, Cuv. 1. c. p. 58, t. 2. fig. 6. 
Crocodilus americanus, Gray, Cat. Tort. 1844, p. 60; Dum. & Bocourt, Miss. Sc. Mex., Rept. p. 30, 
t. 8. fig. 1 and t. 9. fig. 1. 
Crocodilus pacificus, Dum. & Bocourt, Miss. Sc. Mex., Rept. p. 31, t. 9. fig. 5; Sumichrast, Bull. 
Soc. Zool. v. 1880, p. 171. 
Hab. Mextco, Mazatlan, Presidio (Forrer), Tehuantepec (Sumichrast); GUATEMALA 
* The width of the snout is taken on the level of the tenth upper tooth. 
T This figure is again referred to as representing C. moreletii on p. 37, and it will be difficult to decide for 
which it was intended. 
