234 Gill & Toivnsend Diagnoses of Neiu Species of Fishes. 



Macrurus firmisquamis. 



Type 31 inches long. D., 12-126. A., 105. P., 20. V., 8. 



Scales firmly affixed, oblong or rather short, and with considerable ex 

 posed surfaces, which have subequal radiating ridges beset with numerous 

 acute spinelets ; the ridges vary from 3 to 8 in number. Head regularly 

 convex in profile, a fifth of the entire length. Snout longer than the 

 diameter of the eye. Rostral tubercles obsolete and infraorbital ridge 

 rounded. Teeth biserial or triserial. This species is distinguishable from 

 all its American congeners, at least, by the very firm scales. 



Bering Sea, S. W. of Pribilof Islands, 1895. 



Macrurus (Nematonurus) magnus. 



Type 43 inches long. D., 9-128. A., 121. P., 15. V., tf. 



Scales moderately large, readily deciduous, decidedly oblong or long, 

 with a small exposed surface which is beset with five to seven radiating 

 unarmed ridges. Head regularly conical, less than one-fifth of the length. 

 Snout rather long ; projects half its length beyond the mandible. Tuber 

 cles feebly developed, plain and continuous from 3 parallel ridges; infra- 

 orbital flat, with the crest rather nearer the orbit than its lower margin ; 

 its entire surface scaly. Teeth in the upper row biserial or triserial ; in 

 lower jaw imperfectly biserial or uniserial. 



Bering Sea, S. W. of Pribilof Islands. 



Macrurus (Nematonurus) suborbitalis. 



Type 20 inches long. D., 12-85. A., 102. P., 19. V., 11. 



Scales closely adherent and rather large, mostly short and roundish, 

 with considerable exposed surfaces, having radiating ridges beset with 

 weak spines. Head a little more than one-sixth of the entire length. 

 Snout projects little. Median and lateral tubercles are faintly developed ; 

 infraorbital narrow, divided into two well marked areas an upper wider, 

 distinguished by the glassy tubercular scales, and the narrow lower, al 

 most skinny and scaleless; the ridge independently, is little marked. 

 Teeth biserial in the upper jaw, robust in the outer row, very weak in the 

 inner ; uniserial in lower jaw and scarcely incurved. 



Bering Sea, S. W. of Pribilof Islands (station 3603; 1771 fathoms). 



PLEURONECTIDyE. 

 Hippoglossoides robustus. 



Body rather high, its greatest height nearly equaling half the length 

 from the snout to base of caudal. Profile decurved above the eye. Body 

 thick. Scales on head separate and rarely touch each other. Lateral 

 line more arched than in allied species. Teeth of the single row mostly 

 separated from each other by intervals equal to width of teeth, curved 

 inward, and uniform on the sides; toward front four or five enlarged 

 teeth, preceded by two smaller, leaving the middle toothless. In the 

 lower jaw of nearly uniform size and inclining backwards. 



Bering Sea, Lat. N. 56 IV, Long. W. 164 8' (station 3541 ; 49 fathoms). 



