CATALOGUE OF SHIELD REPTILES. 



by the enlargement of the foramina for the two anterior 

 teeth. Tims in old animals there are only four teeth in 

 each intermaxillary bone, while in the younger individuals 

 there are always five. So, more strictly, it is the tenth, 

 and not the ninth, upper tooth which is enlarged."' — P. Z. S. 

 1857, p. 50. 



1. Crocodilns vulgaris. (Olive African Crocodile.) 



Crocodilus niloticus (part.), Baud. Bi pt. ii. p. -<'<7. 



Wagler, Syst. Amph. t. 7. f. 11. I, 1'. 

 Crocodilus vulgaris, Cuvier, Oss. Foss. v. p. 42, 1. 1 . f. 5 & 12, 

 t. 2. f. 7. 



Blainv. Ostiogr. Croc. p. 12G. 



Gray, Ann. <$• May. Nat. Hist. 3rd ser. x. p. 271 ; 

 Trans. Zool. Soc. 1869, vi. p. 147, 1'. 5, <i, 7, 8. 



Huxley, Proc. Linn. Soc. iv. p. 6. 



Bxmn. Gavial. t. 2. f. 6, & t. 3. f. 9 (head). 



Strauch, Croc. p. 4:'. 

 Crocodilus suchus, Geoff. Ann. Mus. x. p. 84, t. 3. f. 2-4. 

 Crocodilus chamses, Bory, Diet. Class. H. N. v. p. 105. 



Fia:. 5. 



Fig. 6. 



Crocodilus lacunosus, Geoff. Croc. aVEgypte, p. 1<I7. 

 Crocodilus marginatus, Geoff. Desc. d'Egypte, p. 365. 



Gray, Cat. Tort. p. 61. 

 Crocodilus cataphractus, EiippeU, MS. 



Gray, Syn. Rept. p. 78 ( Mus. Frankfort). 

 Crocodile vcrd de Senegal, Ailanson, Seneg. 



Cuvier, Oss. Foss. v. p. 4. 

 Crocodilus acutus, Owen, Cat. Osteol. Mus. Coll. Surg. p. 1 57 



n. 715 (not Cuvier). 

 Crocodilus binuensis, Balfour Bailie, P. Z. S. 1857. xxv. 



pp. 49, 50 (skull described). 

 Green Crocodile, Gray, Hep. of Brit. Assoc. 1862, Sections, 

 p. 107. 



Huh. A 1'rican rivers. Living on the mud-banks : North 

 Africa, Egypt; West Africa, Senegal (Adanson), Gaboon 

 (Murray, Cope); South Africa, Cape of Good Hope; Cen- 

 tral Africa, Kwora and Binui ( Baiki I ; -Madagascar (Hue, i. 

 fide Cuvier, Oss. Foss. p. 44) ; Falestine, river Gischon 

 (Macgregor). 



The largest specimen in the British Museum is nearlj 

 Fie. 7. 



Fig. 8. 



Crocodilus vulgaris. Head and nuchal and cervical shields. 



15 feet long. There is a very fine skull received from Old 

 Calabar, whoso greatest width behind is 13 inches, length 

 above upper surface from end of nose to back of occiput 

 22 inches, width at the larger lateral tooth 7| inches, at 

 the notch 4| inches. The intermaxillary bones are produced 

 backwards between the ends of the maxillae. The hinder 

 nasal opening is transverse, inferior, and ascending nearly 

 perpendicularly. The nose has two large oblong diverging 

 prominences on the sides — one over the hinder edge of the 



notch, and the other over the hinder part of the root of the 

 largest tooth, behind the notch. 



There is a second skull from West Africa in the Museum, 

 of nearly the same length, which is considerably narrow n 

 in all its parts. Length along the upper surface from the 

 end of the nose to back edge of occiput 201 inches ; greatest 

 width behind 12 inches, at largest lateral tooth 6i inches 

 at the notch 3| inches. 



These two skulls rather differ in the direction of the 



