454 THE FUR SEALS OF THE PRIBILOF ISLANDS. 



74. Rastrinus scutiger (Bean). 



Trinity Islands and westward, south of the Alaskan Peninsula. 



75. Icelinus borealis Gilbert. 



Described from about Unalaska and from Bristol Bay in deep water, with species 

 of Icelus, etc. 



76. Artediellus pacificus Gilbert. 



Very common. Stations 3637, 3638, and 3639, off St. Paul Island, in 32, 34, and 

 27 fathoms; 3643 and 3644, off Povorotnaya, Kamchatka, 100 and 96 fathoms; 3647 

 and 3648, off Robben Island, in 20 fathoms; station 3674, off Karluk, in 31 fathoms. , 



Recorded by Dr. Gilbert from Bristol Bay and about Sannak and Unalaska. 



Some of these specimens are in better state of preservation aiud show the head 

 with more pores than could be made out in the types. The top of head is thickly 

 studded with these pores, three or four of which are iu the interorbital space. A 

 series of very wide slits along under surface of mandible, continued to base of preop- 

 ercular spine. The wide slits along edge of preorbital and on cheeks are usually six 

 in number. 



AHCHISTES Jordan and Gilbert. New genus. 



Head and body compressed. Lateral line armed with a series of spinous plates; 

 a series of smaller similar i)lates along base of dorsal, widening anteriorly so as to fill 

 the space between dorsal and lateral line, but not extending around front of dorsal to 

 connect with band on the other side. Head naked. Gill membranes broadly united, 

 free from the isthmus. No slit or pore behind last gill. No spines above eye or on 

 vertex. A single gently curved preopercular spine, not forked, and without cuspsor 

 processes. A large fringed supraorbital flap ; smaller flaps and cirri on occiput, sides 

 of head, and along lateral line. Teeth on jaws, vomer, and palatines. Dorsals con- 

 tinuous, notched between spinous and soft portions. Ventrals I, 3, without set*. 

 Vent far forward, immediately behind base of ventral flns; male with a long 9,nal 

 papilla. 



77. Archistes plumariua Jordan and Gilbert. New species. (Plate LIII.) 



A single specimen, 72 mm. long, from Ushishir Island, one of the Kurils. 



Head, 3| in length ; depth, 4. Dorsal, X, 23 ; anal, 18 ; pectoral, 15 or 16. Anterior 

 portion of head compressed and narrow, with vertical sides, the width at angle of 

 mouth little greater than diameter of orbit. From the ocular region the head widens 

 rapidly backward and downward to preopercular spine, leaving the occiput narrow. 

 The greatest width of head and body is near preopercular spine, and is slightly less 

 than depth of head at occiput. The body is compressed, everywhere much deeper 

 than wide. 



Mouth slightly oblique, maxillary reaching slightly beyond vertical from front of 

 pupil, 3^ in head. Eye, 3J in head. Jaws and vomer with rather wide bands of 

 uniform fine teeth ; a small patch on front of palatines. Nasal spines strong, flxed. 

 Preopercular spine strong, simple, directed upward and backward, gently curved. 

 Preopercular margin without further spines or prominences. Opercle thin, without 

 rib or spine. Supraocular rim elevated, projecting above profile of head. Interor- 

 bital space narrow, deeply channeled, the sides sloping convexly. Occiput depressed 

 behind the eyes and transversely rounded, rendering the profile somewhat concave. 



