CARCHARI1D2E. 
435 
47945. Two pieces of similar cartilage; Lower Chalk, Burham, 
KeDt. Presented by the Hon. Robert Marsham, 1877. 
49939. Smaller piece of similar cartilage; Lower Chalk, Glynde, 
C apron Coll. 
49940. Another specimen; Chalk, Arundel, Sussex. Capron Coll. 
42981. Two elongated pieces of cartilage; Maastricht Beds, Hol- 
^ anc ^ Van Breda Coll. 
4183. “ Fragment de Squelette’’ (tesserae of calcified cartilage), 
figured by L. Agassiz, Poiss. Loss. vol. iii. pi. x.b. fig. 6; 
Chalk, Lewes. Mantell Coll. 
39062. Similar fossil figured by F. Dixon, Loss. Sussex, pi. xxxi. 
fig. 15; Chalk, Sussex. Bowerbank Coll. 
42990. Smaller example ; Danian Beds, Maastricht, Holland. 
Van Breda Coll. 
Family CARCHARIlDiE. 
Dorsal fins without spines, the first situated opposite to the space 
between the pectoral and pelvic fins. Eye with a nictitating mem¬ 
brane. Teeth hollow when completely formed, usually pointed. 
Genus CARCHARIAS; Cuvier. 
[Regne Animal, vol. ii. 1817, p. 125.] 
Syn. Carchannus , H. D. de Blainville, Bull. Soc. Pliilom. 1816 p. 121 
(in part). ; 
Snout produced forwards; mouth crescent-shaped, the labial 
groove or fold being confined to, or not extending much beyond, 
the angle of the mouth. Spiracles absent. A pit at the root of 
£ the caudal which has a distinct lower lobe. Teeth with a single 
? sdar P cusp, mostly compressed and triangular ; upper teeth usually 
differing much from the lower teeth. 
> Q According to the characters of the dentition, five subgenera are 
distinguished, as follow :— 
^ A. Rone of the teeth serrated. 
i. Scoliodon, Miiller & Henle (Syst. Beschreib. Plagiostom 
1841, p. 27). 
Upper and lower teeth oblique, not swollen at the base, 
ii. Physodon, Miiller & Henle (op. cit. p. 30). 
Lower teeth swollen at the base, points slender: upper 
teeth compressed, triangular, oblique. 
