LIST OF FISH. 



07 



1. Rhineodon typicus. The Rhineodon. 



Rhineodon typicus, Smith, Illust. Zool. S. Afr. pi. xxvi. 1849. 



Mull. $■ Henle, Plug. 77. 



Hab. — Cape. Mus. Paris. 



B. Dorsal-Jin single ; anal distinct ; gill-slits six or seven. 

 Squali (§ 3), Mull. $• Henle, Mag. Nat. Hist. ii. 1838. Plagiost. 



11. Head flat. Nostrils with a small three-cornered flap. Upper 

 corner fold of the mouth very large ; the under one small. Nicti- 

 tating membrane wanting. Tongue adhering. The spout-holes 

 upright, small. From six to seven gill-openings, decreasing gradu- 

 ally in size from first to last, all before the breast-fins. A middle 

 tooth in the under-jaw. The next five or six teeth of the under-jaw 

 form a saw, which runs from above and within downwards and out- 

 wards ; the fore and inner edges of the teeth are entire or finely ser- 

 rulated throughout. The outermost jaw-teeth are low and flat. 

 The upper-jaw teeth are longer, narrower, and more pointed : the 

 first denticle or point is much longer than the rest; the outer edge 

 thick, the inner one finely serrated, toothed towards the base. The 

 foremost teeth form a heap, and are hook-formed from a broad base. 

 The next following ones have one, or a pair of lateral denticles on 

 the outer side. The outermost teeth as in the upper-jaw. Distinct 

 lateral lines. The first back-fins between the belly-fins and anal, 

 sometimes nearly over the anal. Tail-fin with a small under lobe, 

 notched at the end, which is obliquely or directly truncated. No 

 tail-pits. Gut-valve screw-formed. — Hexanchina. 



Notidiani, Midi. Sp Henle, Plag. 80. 



Notidanini, Bonap. Selach. Tab. Anal. 9, 1838. 



Monopterhinus, Blainv. Bull. Sgc. Phil. 121, 1810. Jour, de Phys. 



203, 1810. 

 Notidanus, Cuv. Reg. An. 2 ed. ii. 340. Mull. £ Henle, Mag. Nat. 



Hist. ii. 1838. 



1. HEXANCHUS. 



Six gill-openings. 



Hexanchus, Rafin. Caratt. 10, 1810. Midi, fy Henle, Mag. Nat. 



Hist. ii. 1838. Plagiost. 80. 

 Notidanus, sp., Cuv. Reg. An. 2 ed. ii. 390. Bonap. Faun. Ital. 

 Monopterhinus, sp., Blainv. Bull. Soc. Phil. 121, 1810. 



1. Hexanchus geiseus. 



Piscis vacca Scilla, t. 1 (teeth), t. 27 (head), t. 28, f. 1 (the whole 

 fish). 



