456 THE FUR SEALS OF THE PRIBILOF ISLANDS. 



83. Astrolytes fenestralis Jordan and Gilbert. Shuinagiii Island (U.S.N.M., No. 23030). 



Dr. lieau records Astrolytes notospilotus from Uualaska. If the locality is correct, 

 tlie specimen probably belongs to A. fenestralis. 



84. Artedius lateralis Girard. U.S.N.M., No. 23934, frora Unalaska. 



No. 38985, from Bering Island, small and in bad condition, seems to be the same, 

 according to Mr. B. A. Bean. 



STELGISTRUM Jordan and Gilbert. New genus. 



Body formed as in HemUepidotus, which it resembles in appearance but with 

 which it is not closely related. Gill-membranes widely joined across the throat, 

 wholly free from the isthmus. Teeth on jaws and vomer; none on palatines. No slit 

 or pore behind last gill. Upper preopercular spine simple, gently upcurved, three 

 short spines below it. No opeicular rib or spine. Nasal spines short and strong. 

 Vertex without si)ines or ridges and without long tentacles. Spinous dorsal without 

 anterior notch, the vertical fins all few-rayed. A series of plates along lateral line, 

 and a band along tlie back which merges anteriorly into the mass of minute plates 

 covering top and sides of head. Ventrals I, 3, without setiu. Vent immediately 

 before origin of anal. 



85. Stelgistrum steinegeri Jordan and Gil)>ert. Now species. (Plate LIV.) 



One sjiecimen, 52 mm. long, from station 3(545, off Eobben Island; depth 10 

 fathoms. 



Head, 2| in length; depth, 3|. Dorsal, IX, 17; anal, 13; pectoral, 10. Caudal 

 with 9 divided rays. Lateral line with 40 plates. Lower series of dorsal band con- 

 taining 35 or 38 plates. 



Head narrowly wedge shaped, tapering upward; width below eyes equaling length 

 of snout and half eye; width at preopercles equaling deptli at occiput. Mouth large, 

 slightly obli(]ue, the wide maxillary reaching vertical behind pupil, eipialing length 

 of snout and eye, half length of head. Teeth small, uniform, in narrow bands on 

 jaws and vomer. Palatines toothless. A deep naked transverse groove between 

 nasal spines and front of orbits. Orbital rims moderately elevated, the interorbital 

 space very narrow, channeled. Occiput flat or slightly concave, angulated along 

 lines running backward from orbits, but without s])ines or ridges. A slender fila- 

 ment above each eye, two minute pairs along sides of occiput, one on suborbital stay, 

 one on maxillary, and a few on i)lates of lateral line. No nasal cirri, none along edge 

 of preopercle. llp])er i)reopercular spine gently curved upward, without cusps or 

 processes. Below it three short spines, the iirst directed backward, the second 

 vertically downward, the third, somewhat longer, directed downward and forward. 

 Eyes small, the diameter ecjualing length of snout, one-fourth length of liead meas- 

 ured to end of opercular Haj). Interorbital width e(iualing diameter ol' pupil. 



Straight portion of lateral line longer tlian the obli(iuely placed anterior portion, 

 which is not strongly curved. The plates of lateral line are strongly spinous on their 

 upper free edges, and are similar and of nearly equal size throughout. The dorsal 

 band is continued onto back of caudal peduncle, where it is continuous with the band 

 of the opposite side. The lower plates of the baud are in a definite lengthwise series, 

 and are as large as those of lateral line or slightly larger. The other plates of the 

 band decrease rapidly in size toward base of fin, where they are minute. They are 



