Jordan and Evermann. Fishes of North America. 2521 



anterior nostril in a long slit, the posterior larger, oblong in shape, and 

 \ concealed by a fold of skin; eye small; the teeth appear only in minute 

 asperities, the intermaxillary band much wider in front than behind ; nian- 

 dibulary band narrow throughout ; vomerine band very narrow, V-shaped ; 

 palatines in a long, broad band; gill openings wide, deeply cleft in front, 

 narrowly joined to the isthmus; branchiostegals 8; no psoudobranchia' .; 

 gill rakers long and slender, not numerous ; gill lamina) moderately long, 

 a long slit behind the fourth gill; scales very small; lateral lines 3 ; caudal 

 fin consisting of few rays, well differentiated from the dorsal and anal ; 

 dorsal beginning not far behind head; ventrals slightly in advance of the 

 pectorals and composed of 2 rays, united by membrane, Avhich forms a 

 margin around them ; pectoral normal, several of its upper rays simple ; 

 vent not much in advance of middle of total length. This genus agrees 

 with Porogadus in nearly every respect except in the scarcity of spines on 

 the head and in the structure of the ventrals. Porogadus has the ventrals 

 composed of 2 distinct rays which are separated throughout their entire 

 length, but in Pcnopus the 2 rays are inclosed in a membrane which con- 

 nects them and forms a margin around them. In Porogadus, also, thesub- 

 operculum has a smooth margin and the opercular spine is weaker than in 

 Penopus, and is not curved. Deep seas, (rtrfvj?, thread; 7tov$, foot.) 



2892. PENOPUS MACDONALDI, Goode & Bean. 



D. 137; A. 102. Greatest height of body equaling length of postorbital 

 part of head and about 9 of total without caudal ; greatest width of body 

 anteriorly about f of its greatest height; head stout, its greatest width 

 equaling of its greatest depth and more than of its length; width of 

 iuterorbital space about ^ length of head; eye very small, its length less 

 than i width of interorbital space; distance from eye to tip of snout 

 equaling length of intermaxillary; distance of anterior nostril from tip 

 of snout equaling length of eye; distance of posterior nostril from eye 

 slightly less than its distance from tip of snout; maxillary expanded 

 behind and reaching somewhat behind eye, its length equaling that of 

 snout; mandible extending much behind eye, its length equal to post- 

 orbital part of head. Dorsal beginning over middlle of pectoral, its rays 

 well developed, those in middle of fin longer than anterior ones; anal 

 beginning under twenty-seventh ray of dorsal, middle rays longest; pec- 

 toral nearly length of head and about equal to distance of its tip from 

 vent; ventral about distance of its origin from origin of anal. Lat- 

 eral lines 3, the uppermost beginning at the upper angle of the gill opening, 

 quickly approaching top of body near base of dorsal and merging into 

 dorsal base about middle of tail; median lateral line beginning a little 

 behind head and extending almost to root of caudal, becoming very faint 

 posteriorly; lowermost lateral line with its origin under and not far from 

 base of pectoral, extending along lower side of tail and merging into base 

 of anal fin somewhat beyond middle of length of tail. Color yellowish 

 brown ; operculum, opercular flap and branchiostegal membrane, pectoral, 

 and ventral dusky. Only a single specimen, 315 mm. long, known; 

 obtained by the Albatross September 18, 1886, at Station 2716, Lat. 38 

 3030 - 81 



