FISHES. 
59 
Aspidophorus QUADRICORNIS. Cuv. ( Sf Val. 
Asp. corpore abbreviato, compresso, lineis tuberculorum utrinque quatuor ; capite quadricorni ; pinnis dorsalibus duabus 
distantibus, priore secundd longiore. 
PLATE XV. FIG. 1. 
Asp. quadricornis. Cuv. fy Val., Hist. Nat. des Poiss. tom. 4. p. 221. pi. 80, 
Hab. in Avatscha Bay, Kamtschatka. 
This species was described by M. Valenciennes, from a single specimen brought home by the 
expedition, and now deposited in tbe British Museum. His description, referred to above, is so 
satisfactory that it is unnecessary again to describe it. The bad state of the individual, however, 
especially about tbe head, has made it desirable to engrave a representation of the fish, made while 
it was recent, by Mr. Beechey. This has also the advantage of showing its natural colours, which are 
entirely lost in the specimen preserved in spirit. 
Mr. Collie’s notes on this species afford no particulars in addition to those which may be 
ascertained from the specimen and the drawing, except that “it is not numerous." — C. 
Genus PEROPUS * 
Blepsias. Cuv. fy Val. 
Dentes velutini apud maxillas, vomerem , et ossa palatina . Radii membranes branchiostegce sex. Pinna dorsalis unica , 
prof unde biloba. Corpus nudum, hispidum. Caput compressum. 
The necessity for removing the species on which the present genus is founded from Blepsias, Cuv. 
& Val., rests on the number of the rays of the brancliiostegous membrane, which are here six 
instead of five; and on the bilobed, and not trilobed, form of the dorsal fin. Except in these 
particulars, the genera coincide almost perfectly. In both the form of the body is rather compressed 
and elongated ; the head cavernous, and furnished with cirri, pendent from either jaw ; the vertical fins 
much expanded; the ventrals very small; the surface devoid of scales, and covered either wholly or 
throughout its greater part with short, rather rigid, bristles ; and the lateral line rough. Both inhabit 
the same locality, the extreme north of the Pacific Ocean. 
Peropus bilobus. 
Per. corpore toto hispido ; pinna dorsali biloba. 
B. 6. D. A. 19. C. 13. P. 14. V. §. 
PLATE. XVI. FIG. 3. 
Blepsias bilobus. Cuv. fy Val., Hist. Nat. des Poiss. tom. 4. p. 379. 
Hab. in Avatscha Bay, Kamtschatka. 
The teeth are small, and numerous on both jaws, on the vomer, and on the palatine bones. None 
are to be found on the tongue; but the branchial arches are furnished with them: in this latter 
situation they are short, angular, and flat. There are also pharyngeal teeth. 
“The intermaxillary bones are shortly pcdicelled." — C. 
The head is compressed. There is a short spine over each nostril. The eyes are directed 
laterally ; the upper part of the orbits rises above the level of the head ; and the space between them 
is concave. From the upper part of each orbit passes backwards an irregular ridge, composed of 
* A Trrjpdc mutilus, 7Tovq pes. 
