1936 Bulletin ^7, United States National Museum. 



of snout; mouth moderate, the maxillary reaching to below posterior mar- 

 gin of eye. Jaws subequal ; villiforni teeth in broad bands on jaws, vomer ; 

 and palatines. Skin thick and firm ; gill membranes forming a moderate 

 fold across the isthmus; upper band of scales of about 4 rows, narrower 

 than the interspace ; first 3 spines of dorsal about equal, lower than those 

 following; soft dorsal high. Olivaceous or reddish, more or less mottled 

 and barred with darker ; belly and lower parts pale, profusely covered with 

 small blackish spots; fins all more or less speckled; skin joining bones of 

 jaws finely spotted with black. Length 18 inches. Kamchatka to San 

 Francisco; abundant from Puget Sound to Sitka; not common in Bering 

 Sea. Smaller than Hemilepidotus jordani and much more varied in color. 

 Here described from a specimen 9 inches in length, from Puget Sound. 



Although much less abundant in Bering Sea than H. jordani, this is the 

 only species which came into the hands of the older writers. The Cottus 

 tracliurus of Pallas, Blepsias ventricosus Eschscholtz, H. iilesii Cuvier & 

 Valenciennes, and H. gibbsi Gill, all belong here. In addition to the 

 striking differences in color, H. Jiemilepidotus is distinguished by the much 

 narrower and deeper interorbital space and the more extensive granula- 

 tions of the bones of the head in adults. The occipital and temporal 

 ridges are more elevated, the granulations finer, extending onto upper 

 portion of opercle, suborbital ring, and bony bridge across cheek. The 

 opercular rib and the suborbital stay are smooth or faintly striate in //. 

 jordani. The vertical fins are constantly shorter and lower than in H. jor- 

 dani 3 the formula, D. XI, 19, A. 15, being constant in all specimens exam- 

 ined. (rfjuiA-eTtidGoros, half-scaled.) 



Cottus hemilepidotus, TILESIUS, Mem. Ac.Petersb., m, 1810, 262, Petropaulski ; based on 



Myoxocephalus cornutus, STELLEB MS., 1741. 

 Cottus trachurus, PALLAS, Zoogr. Ross.-Asiat., m, 138. 1811, Kuril Islands. (Coll. Capt, 



Joseph Billings.) 

 Hemilepidotus tilesii, CUVIER & VALENCIENNES, Hist. Nat. Poiss., iv, 276, 1829; after 



TILESIUS and PALLAS; GUNTHER, Cat., n, 173. 

 Blepsias ventricosus, ESCHSCHOLTZ, Zool. Atlas, 3d Heft, 14, 1. 13, 1829, Norfolk Sound and 



Sitka. (Coll. Capt. Kotzebue.) 

 Hemilepidotus gibbsii, GILL, Proc. Ac. Nat. Sci. Phila. 1862, 13, North west Boundary Survey ; 



no definite locality given. (Coll. Dr. Suckley.) 

 Hemilepidotus trachurus, JORDAN & GILBERT, Synopsis, 715, 1883. 

 Temnistia ventricosa, RICHARDSON, Fauna Bor.-Ainer,, Fish., 59, 1836. 



726. CALYCILEPIDOTUS, Ayres. 

 Calycilepidotus, AYRES, Proc. Cal. Ac. Sci., 1, 1855, 76 (spinosus). 



This genusas very close to Hemilepidotus, from which it differs in the 

 broad union of the gill membranes to the isthmus, the skin not forming a 

 fold across it. The skin of the body is thin and lax and the single known 

 species is much smaller and less robust than the species of Hemilepidotus. 

 The form of the upper surface of the cranium is also different. The ridges 

 on head are prominent., broken up into rough irregular spines; posterior 

 part of supraorbital rim very rough and uneven. (ndXv^ cup : 

 scaled.) 



