130 Mr. C. T. Regan on the 



pectorals. Caudal emarglnate. Sc. 87 |^. Lateral line 

 following dorsal profile at | the height of the body. 

 Gleaming violet above, silvery below. 



Total length 85 raillim. 



Coast of Chili. 



'^ Seriolella Velaini. 



SerioleUa Velaini, Sauvage, Arch. Zool. Exp. viii. 1879, p. 32. 



Depth of body 3| times in total length with caudal (? about 

 3 times in total length without caudal), length of head 4i 

 times (?3f times without caudal). Snout shorter than the 

 eye, the diameter of which is 3^ times in the length of head, 

 and less than the interorbital widtii. ]\1 axillary extending to 

 below the anterior margin of eye. D. VIII 27, spines sub- 

 equal, short, equal in length to half the diameter of the eye ; 

 the soft fin low, the first rays sometimes a little higher than 

 the others. A. Ill 20, emarginate, the anterior rays twice as 

 long as the last. Pectorals falciform, as long as the head. 

 Vtntrals less than half the length of the pectorals and inserted 

 below them. Caudal deeply emarginate. Sc. 90. Lateral 

 line following dorsal profile. Colour? 



Total length 690 millim. 



Island of St. Paul. 



PSENOPSIS. 



Psenopsis, Gill, Proc. Ac. Philad. 1802, p. 157. 



Bathyseriola, Alcock, Aim. & Mag-. Nat. Hist. (6) vi. 1890, p. 202. 



Body ovate, compressed, snout truncate; mouth small, no 

 teeth on the palate. Premaxillaries feebly protractile, 

 maxillaries without supplemental bone, entirely slipping under 

 the pvaiorbital. Opercular bones thin, entire or minutely 

 denticulated, branchiostegals seven ; gill-membranes united far 

 forward, free from the isthmus; pseudobranchise glandular ; 

 gill-rakers rather long ; scales of moderate size, very de- 

 ciduous ; lateral line concurrent with the dorsal profile. A 

 single dorsal fin, with YI-IX 26-30 rays. Anal with 

 111 22-26 rays. Pectorals pointed, with 22 rays. Ventrals 

 below or slightly in front of the pectorals. Vertebra) 2-1. 



Pyloric caeca arborescent. Air-bladder absent. 



Synopsis of the Sped 



es. 



Depth of body 2\ times in total length LP. anomala. 



Depth of body 3| times in total length 2. P. cyanea. 



There can be no question that these two species belong to 

 the same genus, although their relationship has not hitiierto 

 been suspected. The dark mucosa which Alcock described 

 as lining the gill-chamber in P. cijanea is also to be seen in 



