488 THE FUE SEALS OF THE PKIBILOF ISLANDS. 



little projecting beyond the mouth, for a distance not exceeding one-third the inter- 

 space between ends of median and nasal ridge. Infraorbital ridge inconspicuous, 

 scarcely extending beyond the eye. 



Mouth large, oblique, the lower jaw included, the maxillary nearly reaching 

 vertical from posterior edge of orbit, 2^ in head. Outer premaxillary teeth slender, 

 sharp, unequal, rather distant, not very strong, slightly widened and arrow shaped 

 near tip, becoming very small toward angle of mouth. Within this, and well sepa- 

 rated from it, a close-set series of short teeth, directed inward. Mandibular teeth 

 slender, unequal, in a single series corresponding to outer series in upper jaw, slightly 

 widening at symphysis, which is not prominent. Barbel very short, less than half 

 diameter of pupil. Bye of moderate size, equaling distance from tip of snout to 

 middle of anterior nostril, 4^ in head, l-jV in interorbital width. Preopercle broadly 

 rounded, the angle little produced backward, leaving a strip of interopercle exposed 

 along its entire length. Gill membranes joined to the isthmus with a narrow free 

 edge. 



Gill rakers very short and thick, 3 -f 12 in number, including rudiments. 



Dorsal beginning above base of pectorals, the second spine long, filamentous at 

 tip. If in head, its anterior margin sharply serrate except in basal third. Base of first 

 dorsal 2| in head. Interspace between dorsals very short, ustially less than diameter 

 of pupil. Pectorals very long and slender, equaling or exceeding length of head 

 behind snout, their insertion low, below angle of gill arch. Outer ventral ray excess- 

 ively produced, twice or more than twice length of head in uninjured adults, reaching 

 base of fiftieth anal ray or beyond. Vent immediately before anal origin. 



Scales in a strip along the back firm and very rough, none others preserved in 

 our specimens. Scales with three to five sharp radiating ridges, each ridge with 

 several sharply projecting spines, the posterior of which project beyond the margin 

 of the scale. 



Dorsal, 11, 12; pectoral, 19; ventral, 10. 



Color very light gray, the vertical fins blackish posteriorly. Mouth and gill 

 cavity and peritoneum jet black. 



Four specimens, 24 to 41 cm. long, from station 3634, off Bogoslof Island, in 664 

 fathoms. The species is named for Mr. George Archibald Clark, secretary of the 

 Fur-Seal Commission. 



214. Bogoslovius firmisquamis (Gill and Townsend). 

 Dredged in Bering Sea by the Albatross. 



Family PLEURONECTID^E. 



215. Hippoglossus hippoglossus (LinnaeiiB]. 



Generally common. St. Paul, Unalaska, TJnga, Karluk, 



216. Atheresthes stoniias Jordan and Gilbert. 



Generally common with the preceding, but reaching a much smaller size. 

 Unalaska, XJnga, Karluk. 



217. Hippoglossoides elassodon Jordan and Gilbert. 



Perfectly typical specimens from stations 3643 and 3644, off Kamchatkan coast, 

 in 100 and 96 fathoms. Also taken by us off Karluk, and recorded by Dr. Gilbert 



