THE FISHES OF ALASKA. 



317 



from 2.75 to 7.5 inches, and agree well with current descriptions. The key in Fishes of North and 

 Middle America, however, is defective, in that it woiild require this genus to have the gill-membranes 

 free from the isthmus, which, of course, is not the case. 



Originally described by Bean (1891) from Albatross station 2853, off Trinity Islands. Recorded 

 by Gilbert (1895) from stations 3227, 3330, and 3331, north of Unalaska, and from stations 3337 and 3339, 

 south of Unima Pass. 



144. Porocottus sellaris (Gilbert). 



Described by Gilbert (1895) as Acanliiocottus sdlans, from stations 3229 to 3234. 3244. 3247. and 

 3300, all in Bristol Bay. 



145. Porocottus quadrifilis Gill. 

 Recorded from St. Michael and Kegiktowik (Nelson 1887). 



146. Porocottus bradfordi Rutter. 



The collection contains 27 specimens collected at Karluk Beach, June 8-10, 1903. and no. 2223, also 

 from Karluk, 1903. 



Originally described by Rulter ( 1899) from Karluk. 



147. Oucocottus quadricornis iLinnseus). 



Recorded from Point Barrow and Meade River (.Mmxloch 1885), and St. Michael (Nelson 1887), as 

 Cotlus quadricornis. 



Fig. 78.— Oncocottus quadricornis (Linnteus). 

 148. Oncocottus hexacoruis (Richard.soni. (PI. xvii, fig. 2.) 



Recorded from Herschel Island and Grantley Harbor (Scofield 189(5). 



We have 3 specimens which we provisionally identify with this species: no. 90. 91, and 92, 8 to 9 

 inches long, collected by Dr. Gilbert from a salmon trap at Graveyard Point, Kvichak River, near 

 Koggiung, July 16. 1903. 



Head 3.16 in length: depth 5.75; eye 6.8 in head; snout 4.75; maxillary 2; mandiljle 1.9; inter- 

 orbital 6; dorsal viii-14; anal 14; ventral i, 3; pectoral 17; branchiostegals 6. 



We have also a specimen 2 feet long, no. 2179, collected by the Albatross in Uganik Bay, Kodiak 

 Island. As it differs somewhat from the above and from current descriptions of the species, we give a 

 full description of it: 



Head 2.75 in length; depth 5.25; eye (orbit) 8.55 in head (orbital rim 6.2) : snout 3.3; maxdiary 1.66; 

 mandilile 2; interorbital broader than length of orbit but not equal to orliital cavity. 2 in snout; dorsal 

 ix-14; anal 13; pectoral 19; ventral i. 3; caudal 9 forked rays; branchiostegals 6. 



Body elongate; ventral outline straight; dorsal outline from tip of snout to end of spinous dur.sal 

 gently arched and slightly bulging, from there to base of caudal straight, the head, however, slightly 

 depressed; posterior part of body somewhat compressed; caudal peduncle rather long but stout, its 

 length 1.1 in snout, its depth about half its length. 



Head large and broad, the snout rather blunt, its anterior profile a straight slope from the prominent 

 tubercle of the premaxillary pedicel; mouth wide and capacious, the gape extending to below pupil, the 



