42 Mr. C. T. Regan on the 



developed and with the point deflected laterally, in the 

 absence of tin-spines, and in the posterior position of the 

 dorsal fins, the first above the pelvics. 

 A single species. 



1. Echinorhinus S[>inosus. 



Squalus sj)inosus, Gnielin, Linn. Syst. Nat. i. p. 1500 (1788). 

 Echinorhinus spinosus, Blaiuv. Bull. Soc. Philom. 1810, p. 121 ; Mull. 



& Henle, Plagiost. p. 96, pi. lx. (1841); Dumeril, Elasmobr. p. 459 



(1865); Giinth. Cat. Fish. viii. p. 428 (1870) ; Parker, Trana. X. Z. 



Inst. xvi. 1884, p. 280 ; McCoy, Prodr. Zool. Vict. pi. cxliv. (1888) ; 



Jord. & Evenn. Bull. U.S. Nat. Mus. xlvii. 1896, p. 58. 

 Echinorhinus obesus, Smith, 111. Zool. S. Afr., Fish. pi. i. (1838). 



Bab. From the North Atlantic and the Mediterranean to 

 South Africa, Australia, and New Zealand. 



In the British Museum four specimens, the largest nearly 

 3000 mm. in total length. 



3. OXYNOTUS. 



Oxynotus, Rafin. Indie. Ittiol. Sicil. p. 45 (1810). 

 C'entrinu, Cuv. Regne Anim. ii. p. 130 (1817). 



Body rather deep, trihedral ; mouth rather narrow, trans- 

 verse ; upper teeth subcorneal, forming a group in front of 

 the jaw ; lower teeth erect, triangular, finely serrated ; dorsal 

 fins large, each with a spine. 



A single species. 



1. Oxynotus centrina. 



Squalus centrina, Linn. Syst. Nat. i. ed. 10, p. 2.33 (1758), and ed. 12, 



p. 398 (1766). 

 Oxynotns centrina, Rafin. Indie. Ittiol. Sicil. p. 45 (1810) ; Dumeril, 



Elasmohr. p. 444 (1865) ; Goode & Bean, Mem. Mus. Comp. Zool. 



xxii. 1896, p. 15, fig. 21. 

 Centrina salriani, Risso, Eur. Merid. iii. p. 135 (1826) ; Mull. & Henle, 



Plagiost. p. 87 (1841) ; Giinth. Cat. Fish. viii. p. 417 (1870). 



Hab. Mediterranean and neighbouring parts of the Atlantic. 

 In the British Museum eight specimens, 220 to 720 mm. 

 in total length. 



Centrina bruniensis (Ogilby, Rec. Austral. Mus. ii. 189-4 

 p. 62), from Tasmania, appears to be identical with O. cen- 

 trina, from which it is said to differ in the larger fins. This 

 is due, however, to the small size of the specimen described. 



