48 Mr. C. T. Regan on the 



8. Squalus uyatus. 



Squalus uyatus, Rafin. Caratt. p. 13, pi. xiv. fig. 2 (1810). 

 Spinax uyatus, Bouap. Fauu. Ital., Pesc. (1834). 



Acanthias uyatus, Miill. & Henle, Plagiost. p. 85 (1841): Dura6ril, 

 Elasmobr. p. 439 (1865) ; Giinth. Cat. Fish. viii. p. 419 (1870). 



Hab. Mediterranean ; Madeira. 



In the British Museum two specimens, 330 and 340 mm. 

 in total length. 



This species is very distinct from others of the genus, but 

 is a true Squalus^ and cannot be placed in Gentrophorus^ as 

 has been recently suggested by Garman (Bull. Mus. Comp. 

 Zool. xlvi. 1906, p. 204). 



6. SCYMNOUON. 



Scymnodon, Bocage & Capello, Proc. Zool, Soc. 1864, p. 263. 

 Zameus, Jord. & Fowler, Proc. U.S. Nat. Mus. xxvi. 1903, p. 633. 



1. Scymnodon ring ens. 



Scymnodon ringens, Bocage & Capello, Proc. Zool. Soc. 1864, p. 263, 



lig. 5. 

 Centrophorus i-mgens, Giintli. Cat. Fish. viii. p. 423 (1870) ; Sim, Aun. 



Scot. N. H. 1902, p. 13. 



Dermal denticles small, each with from two to four parallel 

 keels. Pra^oral length of snout § of the distance from eye to 

 first gill-opening. Length of base of first dorsal (without the 

 spine) about \ of the distance from the second. 



Hah. Atlantic coasts of Europe, in deep water. 



In the British Museum two specimens, 900 and 1000 mm. 

 in total length. 



2. Scymnodon squamulosus. 



Centrophorus squamulosus, Giinth. ' Challenger ' Deep-sea Fishes, p. 5, 



pi. ii. iig. B (1887). 

 Zarneus squamulosus, Jord. & Fowler, Proc. U.S. Nat. Mus. xxvi. 1903 , 



p. 633. 



Dermal denticles very small, each with a strong median 

 keel and sometimes a pair of short lateral keels. Pr^eoral 

 length of snout | the distance from eye to first gill-opening. 

 Length of base of first dorsal (without the spine) less than ^ 

 the distance from the second. 



Flah. Japan, in deep water. 



In the British Museum one specimen, type of the species, 

 650 mm. in total length. 



