ICHTHYOLOGICAL COLLECTIONS OF THE ALBATROSS. 455 



Three specimens, 113 to 166 mui. long, from stations 3253 and 3254 in Bristol Bay, 

 in 36 and 46 fathoms. 



129. Aprodon corteziana Gilbert. 



One specimen from station 3349, off the coast of northern California; deptli 239 

 fathoms. 

 The depth in this species \'aries from 7^ to 9, the head from 4J^ to 4^ in length. 



130. Maynea pusilla Bean. 



A few small specimens from north of Unalaska, at stations 3224, 3227, 3330, and 

 3331; depth 121 to 351 fathoms. 



131. Gymnelis viridis (Fabricius). 



Two specimens from between tide marks at Unalaska, one from station 3256 in 

 Bristol Bay ; depth 49 fathoms. 



132. Lycodapus fierasfer Gilbert. (Plate 32.) 



Several specimens from station 3324, in Bering Sea, north of Unalaska Island ; depth, 

 109 fathoms. The statement in the original description (Proc. U. S. Nat. Mns. 1890, 

 108), "ventrals narrow," etc., applies instead to the pectorals, the ventrals being 

 absent in this genus. 



133. Lycodapus extensus sp. uov. 



An extremely slender elongate form, with head smaller than in L. fierasfer, but 

 otherwise resembling that species more than L. parviceps. The head is 6| in length, 

 the depth of body 15^. Gill-openings as in L. fierasfer, extending well above base of 

 ventrals. Skin thin, the mucous pores inconspicuous, evident on mandible and 

 along margin of preopercle. Upi)er profile of head longitudinally concave, shaped as 

 in fierasfer, but slenderer, its depth greater than that of body. Mouth oblique, the 

 maxillary reaching vertical from middle of eye, 2\ in head. Teeth in narrow bands 

 in both jaws, tapering laterally to single series. Vomerine teeth more numerous 

 than in L. parviceps ot L. fierasfer, small, not canine-like, in a single series. Palatine 

 teeth wanting, as in some individuals of L. fierasfer. Eye 4^ in head. Interorbital 

 space 1^ in eye. Snout 3f in head. Occiput midway between front of dorsal and 

 anterior nostril. Pectorals slenderer and longer than in fierasfer, 2f in head. Head 

 and trunk contained 2J times in tail. Dorsal 96, the extreme end of the tail wanting. 



Color, light brownish, the black peritoneum visible through the skin of the abdomen. 

 Mouth and gill-cavity largely dusky. A narrow dark-brown streak along base of 

 dorsal and anal, occupying, toward tii> of tail, the entire height of both fins. 



A single specimen, 92 mm. long, from station 3324, north of Unalaska Island; depth 

 109 fathoms. 



134. Lycodapus parviceps sp. nov. 



Similar to L. fierasfer, differing in the much smaller head, longer, slenderer body, 

 the thicker skin with more evident mucous pores, and in the more restricted gill- 

 openings. Head short, 7f in length (5^ to 5| in fierasfer); depth 11. Upper profile 

 ol head nearly straight, not longitudinally concave, as in fierasfer. Head deeper and 

 narrower, the snout less spatulate. Skin thicker. A conspicuous series of pores on 

 mandible and along preopercular margin. Gill-slit very oblique, as in fierasfer, 

 extending anteriorly as far as vertical from eye, the membranes then narrowly 

 united, free from the isthmus except at extreme front. The gill-slit is superiorly 

 much more restricted than in fierasfer, not extending above base of pectorals, 

 while in the latter it extends above them for two-thirds diameter of eye. 



Mouth oblique, the maxillary reaching vertical from middle of eye, 2^ in head. 

 The jaws are even at tip, the mandible slightly included laterally. Mandibular teeth 

 in a moderate band anteriorly, the inner series enlarged, narrowing posteriorly to a 

 single row. Premaxillary teeth of uniform size, in a narrow band throughout. 



