54 Mr. C. T. Reo-an on the 



12. Centrophorus tessellatus. 



■s. 



Hub, Ja[)an. 



Centrophorus tessellatus, Garm. Bull. Mus. Comp. Zool. xlvi. 190n, 

 p. 205. 



13. Centrophorus moluccensis. 



Centrophorus moluccensis, Bleek. Act. Soc. Sc. Indo-Neerl. viii., Am- 

 boyna, p. 3 ; Giinth. Cat. Fish. viii. p. 4lil (1870). 



Uab. Ainboyiia. 



In the British Museum one speciaieu, 210 miu. in total 

 length, type ot the species. 



9. SCYMNORHINUS. , 



Scymnorhimis, Bonap. Cat. Pesc. Europ. p. 16 (1836). 

 Dalatias *, Gray, Cliondropt. p. 75 (1851). 



'i'his genus differs rroni Scymnodon in the absence ul rin- 

 spines and in having the hjwer teeth tineiy seirate.l. 

 A single speeies. 



Scyniiiorhin us lichia. 



Squalus licha, Bonnaterre, Encycl. Ichth. p. 12 (1788). 



Scynmus lichia, Cuv. Regne Anim. ed. 1, p. 130 (1817) ; Miill. & Henle, 



Plagiost. p. 92 (1841); Duuj^ril, Elasmobr. p. 452 (1865); Giinth. 



Cat. Fish. viii. p. 425 (1870). 

 Dalatias lichia, Grav, Cli(»ndropt. p. 75 (1851) ; Jord. & Fowler, Proc. 



U.S. Nat. Mus. xxvi. 1903, p. 637. 



Uah. Mediterranean and neighbouring parts of tlie At- 

 lantic; Japan. 



In the British Museum nine specimens, o20 to 12S0 mm. 

 in total length, including one from Japan. 



10. SOMNIOSUS. 



Somniosus, Le Sueur, Journ. Ac. Philad. 1818, p. 222. 

 Lcemarffus, Mull, k Heule, Plagiost. p. 03 (1838). 



Two species. 



1. Somniosus microcephalus. 



Squalus mierocephalus, Schneid. Bloch's Syst. Ichth. p. 135 (1801). 

 Squalus borealis, Scoresby, Arct. Reg. i. p. 538, pi. xv. figs. 3 & 4 (1820). 



* Dalatias sjiarophagus, described and figured by Eafinesque, was 

 probably either Scymnorhinus lichia or Somniosus rostratus. Dalatias, 

 like Etmopterus, may be regarded ae a nomen nudum. 



