FISHES OF THE PHILIPPINE ISLANDS AND ADJACENT SEAS 275 

 PSEUDOSCYMNUS BOSHUENSIS Herre 



Pseudoscymnus boshnensis Heere, Copeia, No. 3, p. 124, fig. 2, 1935 (type local- 

 ity: Boshu, Sagami Bay, Japan). 



Depth 8 in total; head measured to first gill opening 2V5, width 

 II/4. Snout 414 in head; eye 4%, II/2 in snout, 2l^ in interorbital ; 

 mouth width gently arched, width 3i/^ in head; upper lip extended 

 laterally into prolonged skinny flap reaching far below mouth and 

 concealing its outer fourth; upper teeth simple, awl-shaped, with 4 

 rows of different sizes in use; only 1 row visible in lower jaw, ser- 

 rate cusps slightly oblique, with more or less evident basal notch on 

 outer side; space between outer nasal edges 3% in head, internasal 

 space 4%, lower or innermost concealed by scaly flap; interorbital 

 2%05 ^ov7. Gill openings narrow. Spiracle 2% in orbit. 



Scales smooth as stroked toward caudal, very rough and spines- 

 cent as rubbed toward head. 



Small first dorsal well premedian, base 3 in head measured to first 

 gill opening, hind edge truncate; second dorsal larger, middle of 

 base over hind end of ventral base, base 2% in head, hind edge 

 slightly concave ; subcaudal origin little in advance of upper caudal 

 origin, fin 31/10 in total fish, front edge of subcaudal 2i^ in caudal 

 length ; least depth of caudal penduncle 514 in head to first gill open- 

 ing; pectoral li/4, width 2 in its length; ventral I14 in head. 



Color in alcohol blackish brown. Peculiar scales on lower side 

 of snout glisten with brilliant metallic luster. Dorsals, subcaudal, 

 and paired fins black with pale margins. 



Length, 337 mm. (Herre.) 



Japan. 



Genus SOMNIOSUS Lesueur 



Somniosus Lesueur, Journ. Acad. Nat. Sci. Philadelphia, vol. 1, p. 222, 1818. 



(Type, Somniosus brevipinna Lesueur, monotypic. ) 

 Laemargus MtJLLER and Henle, Sitz. Ber. Akad. Wiss Berlin, p. 116, 1837. 



(Atypic. Type, Squalus borcalis Scoresby, in Miiller and Henle, Syst. Beschr. 



Plaglostomen, p. 93, 1841. Type, Squalus borealis Scoresby, designated by 



Jordan, Genera of Fishes, pt. 2, p. 192, 1919.) 

 Leiodon Wood, Proc. Boston Soc. Nat. Hist., vol. 2, p. 174, 1846. (Type, Leiodon 



echinatum Wood, monotypic.) 

 Rhinoscymnus Gill, Proc. Acad. Nat. Sci. Philadelphia, 1864, p. 264. (Type, 



Scymnus rostratus Risso, monotypic.) 



Body elongate, robust. Head rather short. Snout moderate. 

 Mouth transverse, with deep straight groove across each angle and 

 with labial folds. Upper teeth pointed, raptorial, several series 

 functional ; lower teeth wider, sectorial, with cusp directed obliquely 

 outward, presenting inner edge of each tooth toward upper teeth 

 and with notch on outer edse at base. Nostrils near snout end. 



