2444 BtiUetin ^7, U^iited States National Museum. 



924. LYCONECTES, Gilbert. 



Lyconectes, Gilbert, Kept. U. S. Fish Comm. 1893 (1896), 452 (aleutentit) . 



Month fsub vertical ; lower jaw projecting; premaxillary protractile. 

 Teeth strong, conic, wide set, in more than 1 series. Mucous pits prom- 

 inent on head. Gill opening narrow, ceasing opposite middle of base of 

 pectorals, the membranes widely joined to isthmus. Dorsal and anal 

 wholly joined to caudal, the latter extending well beyond them; dorsal 

 fin composed of spines only; no ventral fins. Body naked; no lateral 

 line. This genus differs from Cryptacanthodes principally in the absence 

 of palatine teeth, agreeing with it in general appearance and in most 

 details of structure. Alaska. (/lvx:os, wolf; 7'7/Kr?)p, swimmer.) 



2800. LYCONECTES ALEUTEXSIS, Gilbert. 



Head 7i; depth 14^. D. LXIX; A. 49; P. 13; caudal 18. Head square 

 in cross section, the upper and lower surfaces plain, the cheeks vertical, 

 the depth and width equal. Mouth still more oblique than in Cryptacan- 

 thodes maculatiis, with much heavier mandible and less expanded maxil- 

 lary, the exposed portion of the latter lying vertically, and not extending 

 beyond vortical from middle of eye. Teeth all similar, few in number, 

 those in premaxillary arranged in 2 series, the inner of which are smaller 

 than the outer, from which they are separated by a wide interspace; teeth 

 in mandil)le in a single series laterally, becoming a sparsely filled patch 

 toward symphysis; 4 or 5 similar conical teeth on head of vomer; pala- 

 tines toothless. A long nostril tube overhangs the upper lip. Upper lip 

 separated by a fold from forehead, the upper jaw protractile. Eye 

 extremely small, sunken in the socket, which it does not nearly fill, its 

 diameter slightly less than ^ interorbital width; supraorbital rim not ele- 

 vated, and containing no conspicuous projections; suborbital rim swollen, 

 with an enlarged mucous channel; a conspicuous series of mucous pits 

 along each mandible and the margin of preopercle; 2 series on top of 

 head diverging backward from above the eyes; otherwise no pits or pro- 

 jections on bead; a shallow triangular depression on occiput. Gill slit 

 much less oblique than margin of preopercle, its length li times the dis- 

 tan>ce between lower ends of gill slits, the latter reaching the vertical 

 from middle of opercles. Dorsal fin of rather flexible spines, not con- 

 cealed in heavy fin membranes; origin of dorsal immediately behind axil 

 of pectorals. Hinder margin of occiput midway between front of dorsal 

 and middle of eye. Origin of anal well in advance of middle of length, 

 its distance from tip of snout contained 1* times in its distance from base 

 of caudal. Pectoral short, rounded, its base separated by a wide prepec- 

 toral area from gill slit, the width of area f length of fin, the latter equal- 

 ing distance from tip of snout to middle of eye. No ventrals. Body 

 covered with lax naked skin, which also covers but does not obscure rays 

 of anal fin; no pores to lateral line. Color in life, reddish on head, body, 

 and fins, due to the bloodvessels in the skin. Aleutian Islands. A single 

 specimen, 180 mm. long, known, (Gilbert.) 



Lyconectes aleutensis, Gilbert, Kept.U. S. Fish Comm. 1893 (1896), 452, pi. 34, fig. 3, Alba- 

 tross Station 3312, north of Unalaska Island, in 45 fathoms. (QoVi. Albatross.) 



