LIST OF FISH. 69 



Le Perlon (Squalus Notidianus cinereus), Cuv. Reg. An. 2 ed. ii. 



390. 

 Notidanus cinereus, Semap, xii. 



Monopterhinus cinereus, Blainv. Bull. Soc. Phil. 121, 1816. 

 Heptranchus cinereus, Midi. $• Henle, Plag. 81. Rajin. Caratt. 



13. 



Hab. — Mediterranean, Ocean. 



a. Stuffed. From the Antarctic Expedition. Presented by the 

 Admiralty. 



C. Anal none ; dorsal-fins two; nictitating membrane none. The 

 Jive gill-holes all before the breast-fins ; gut-valve spiral; spiracles 

 distinct. 



Squali (§ 4), Milll. $r Henle, Mag. Nat. Hist. ii. 1838. Plagiost. 



12. A spine before each back-fin. — Ancantiana. 



Acanthorhinus, sp., Blainv. Bull. Soc. Phil. 121, 1816. Jour, de 



Phys. 263, 1816. Mull. <$• Henle, Mag. Nat. Hist. ii. 1838. 

 Spinaces, Mull. 8f Henle, Plag. 

 Spinax, Cuv. Reg. An. 2 ed. ii. 390. 

 Spiuacini, Bonap. Selac. Tab. Anal. 4, 8, 1838. 



1. ACANTHIAS. 



Head flat. Large corner pits to the mouth. Two labial carti- 

 lages above, one below. The mouth forms a very flat arch. Spout- 

 holes big, behind, and somewhat above the eyes, a roll-like flap to 

 the spout-hole, springing from its fore edge. The eye-openings are 

 long. Teeth above and beneath, cutting with an almost horizontal 

 edge, and a point inclined outwards. The root of the tooth is 

 higher on the inner part than on the outer, and has a longitudinal 

 keel on the inner one ; the outer part forms a round ledge towards 

 the point of the tooth. First back-tin between the breast and belly- 

 fins. Second betwixt the belly-fins and caudal. The upper lobe of 

 the latter is the bigger one. A tail-pit exists in some. The males 

 have on the outside of the ends of their appendages a moveable 

 prickle or spine, with a slightly curved tip. Scales heart-shaped, 

 with a middle point, and one or more keels. 



Acanthias, Bonap. Selac. Tab. Anal. 8, 1838. Mull, fy Henle, 



Mag. Nat. Hist. ii. 1838. Plagiost. 84. 

 Acanthorhinus, sp., Blainv. Bull. Soc. Phil. 121, 1816. 

 Spinax (Acanthias) sp., Cuv. Reg. An. 2ed. ii. 392, 1817. 

 Squalus, Rajin. Caratt. 



