3. CROCODILUS. 283 
6. Crocodilus niloticus. 
Lacerta crocodilus, part., Linn. S, N. i. p, 359 (1766), 
Crocodilus niloticus, Laur. Syn. Rept. p. 53 (1768); Daud. Rept. 
li. p. 867 (1802). 
? Crocodilus africanus, Laur. 1. c. p. 54, 
Crocodilus vulgaris, Cuv. Ann. Mus. x. p. 40, pls. i. & ii. (1807) ; 
Geoffr. t.c. p. 82, pl. il., and Descr. Egypte, i. p. 185, pl. ii. 
(1829) ; Tvedem., Opp., § Lib. Nat, Amph. p. 68, pl. viii. (1817); 
Gray, Cat. Tort. Sc, p. 61 (1844); Huxley, Journ. Linn. Soc. iv. 
p. 6 (1860); Strauch, Syn. Crocod. pp. 43 & 90 (1866); Gray, 
Trans. Zool. Soc. vi. p. 147, figs. (1867), and Cat. Sh. Rept. ii. 
p- 15 (1872); Boetty. Ber. Senck. Ges. 1879-80, p. 199 (1880) ; 
Peters, Reise n. Mossamb. iii. p. 19, pl. iv. fig. 1 (1882). 
suchus, Geoffi. dl. ce. pp. 84, 243. 
—— chamses, Bory de St. Vine. Dict. Class, d’ Hist. Nat. v. p. 105 
(1824). 
marginatus, Geoff. Descr. Egypte, p. 260; Gray, Cat. Tort. 
&§e. p. 61. 
Teaeicets Geoff. 1. c. p. 261. 
—— complanatus, Geoff. 1. ¢. p. 265. 
vulgaris, part., Dum. § Bibr. iii, p. 104 (1836). 
—— hinuensis, Baikie, Proc. Zool. Soc, 1857, p. 48. 
madagascariensis, Grandid. Ann. Se. Nat. xv. art. 20 (1872) ; 
Gray, Proc. Zool. Soc. 1874, p. 145, pl. xxiii. ; Boettg. Abh. Senck. 
Ges, xi. p. 27, pl. —. fig. 6 (1877), and xii. p. 486 (1881). 
18 or 19 upper and 15 lower teeth on each side. Snout variable 
in length, once and two thirds to twice as long as broad at the 
base; head rough above, but without any marked ridges; mandi- 
bular symphysis extending to the fourth or fifth tooth ; praemaxillo- 
maxillary suture, on the palate, directed backwards or W-shaped ; 
nasal bones separating the premaxillaries above. Four large 
nuchals forming a square, usually with a smaller one on each side, 
sometimes followed by other smaller nuchals and thus subcontinuous 
with the dorsal shield ; four or six nuchals in a transverse series 
behind the occiput. Dorsal scutes in 16 or 17 transverse and six 
or eight longitudinal series; sides with scattered smaller scutes, 
Fingers webbed at the base; outer toes extensively webbed. <A 
serrated fringe on the outer edge of the leg; scales on the limbs 
feebly keeled or smooth. Adult dark olive above; young pale 
_ olive, speckled or vermiculate with black, and with scattered large 
black spots. 
The largest specimen in the Collection measures 43 metres. 
Africa, from the Nile and the Senegal to the Cape of Good Hope ; 
Syria; Madagascar. 
a, Ad., stffd. Egypt. 
b. Ye., stfid.5 Egypt. Sir J. Wilkinson [P.}, 
ce. Yg., spir. Egypt. 
d-e. Yg., mummies, from Egypt. 
tombs. 
SF, 9; 2; t, h, 1, my nN. Ad., Eeypt P 
her., & yg., stftd. 
o. Ad., stftd. Kenneh, Nile. W. Gilbey, Esq. [P.}. 
