642 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



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supraorbital cirrus. Gill -membranes broadly connected, free from tlio 

 isthmus; gill-rakers short, tubercle-like. Scales small, mostly ctenoid. 

 Head more or less scaly, without spines. Lateral lines usually 5 on 

 each side. Dorsal fin long, sometimes with a dee}) emargination be- 

 tween the spines and the soft rays; dorsal spines slender, 10-22 in 

 number; anal fin elongate, with a single rudimentary spine; rays of 

 pectorals and anal exserted and almost simple; pectoral rounded, with 

 broad, iirocurrent base, the rays thick; ventrals well developed, placed 

 at a considerable distance behind the root of the pectorals; caudal sub- 

 truncate. Branchiostegals 6. Pyloric coeca numerous (about 13). ISTo 

 air-bladder. Species of rather large size and bright coloration; abun- 

 dant in the North Pacific. (f|, six; yparj.rj.rj, line.) 



a. Dorsal liu coutiuiions, or but sliglitly emarginate. (Pleurogrammus* Gill.) 



997. H. moaaopterygiiis (Pallas) J. & G. 



Dark olive above, yellowish below, the color of the back forming sev- 

 eral broad cross-bars on the sides; fins dusky, nearly plain; the pec- 

 toral with blackish margin ; ventrals blackish. Body rather stout, little 

 compressed. Mouth moderate, the maxillary extending to below the 

 front of the large eye. Teeth in the jaws in bands, the outer series 

 somewhat enlarged and recurved; teeth on vomer, and a few asperi- 

 ties on the i)alatines. Supraocula:r cirri small. Cheeks partly naked; 

 opercles w'ell scaled; scales small, all rough. Five lateral lines, the 

 fourth of these ceasing on the belly. Dorsal fin high and continuous; 

 pectoral rather large; ventrals long, inserted behind the pectorals at 

 a distance of twice the diameter of the eye. Head 4J; depth 4. D. 

 XXI-25; A. 24. Coast of Alaska; not rare. 



{Lahrax monoptert/gius Pallas, M^m. Ac. Sci. Petersb. ii, 391, 1810, and in Zoogr. 

 Rosso- Asiat. iii, 281: Chirus monopterygins GUnther, ii, 92.) 



998. H. ordiBiatsas (Cope) J. & G. 



"Dorsal fins not very elevated, continuous, but with a slight depres- 

 sion at the point of union of the two; a dentate flap above each eye; 

 laterah lines of pores 5, only three of which extend to the basis of the 

 caudal fin, viz, the second, third, and fifth; the first extends to opposite 

 the middle of the second dorsal; the fourth commences below and in 

 front of the basis of the pectoral, and extends to a point a little behind 

 that measured by the extremity of that fin; the inferior series of oppo- 

 site sides converge and unite a little behind the basis of the ventrals 



Gill, Proc. Acad. Nat. Sci. Phila. 1861, 166: type Lahrax vionopterygius Pallas. 



