Jordan and Rrermann. Fishes of North America. 565 



examined by us (Allmfromi Coll.), from off Point Arena, Humboldt 

 County, California, in 455 fathoms, (theta, from the form of the lumi- 

 nous spots.) 



IHnpJnnix ///.(, EKJF.NMANN- A: EKJKNMANX, Proc. Cal. Ac. Sci., March, 1890, in, 4, Point 



Loma, near San Diego. (Coll. Kigenmanu.) 

 ~Mii<-ll>l,inn proi culm, GIT.KKKT, Pmc. U. S. Nat. Mus., 1890, July, 52, coast of Washington, 



in 584 fathoms, Albatross Station 3072; specimens in poor condition, not showing 



division of photophores. (Type, No. 41922. Coll. Albatross.) 



263. ^THOPRORA, Goode & Bean. 



,/;/// o; )?/<(, C.oom: t t BKAX, Oceanic Ichthyology, 80, 1895, (melopoclampa). 



Body oblong, compressed, resembling Myctophum in form ; covered 

 with large scales, those in the lateral line very slightly larger than the 

 others. Head compressed. Snout very obtuse and short, projecting 

 slightly beyond orbital margin, the jaws about equal. Eye moderate. 

 Dorsal fin premedian, entirely or almost entirely in advance of the anal, 

 which it closely resembles in shape and dimensions ; ventral with 8 rays 

 inserted under the anterior portion of the dorsal ; pectorals moderate, 

 placed low ; adipose fin long and prominent. Luminous gland of irregu- 

 lar form occupying the front of the head in advance of eye; usually 

 another below eye; these separate from their fellows on the other side; 

 a luminous spot or glandular body of greater or less extent upon the 

 body at the angle of the preoperculum and, in some species, others upon 

 the interoperculum and upon the sides of the lower jaw. Precaudal 

 photophores 4, forming a more or less crescent-shaped line at the base of 

 the lower caudal lobe. Deep seas; very close to Diaphus, differing only 

 in the simple photophores. (aWo^, glow, and Trptipa,, prow, front.) 

 . Scales 35 or 36. 



b. Anterolateral photophores 2 ; mediolaterals 2 ; posterolaterals none. LUCIDA, 847. 



bb. Anterolateral photophores 1; mediolaterals 3 or 4 ; posterolaterals 2. EFFULGENS, 848. 



847. YETHOPHRORA LUCIDA, Goode & Bean. 



Head 3 ; depth 4| ; eye about 4. D. Ill, 14 ; A. II, 14 ; scales 35. Least 

 depth of tail 2-\- in height of body. Head considerably longer than high, 

 its height equal to distance from anterior margin of pupil to end of 

 opercular flap. Snout short, but less declivous and obtuse than in Jl. 

 metopoclampa. A pearl-colored luminous organ touching the limb of 

 orbit, but separated from it above and below, with posterior lobe not 

 prolonged far back, and with a space between its lower margin and the 

 opening of the jaw. Cleft of mouth oblique and curved, the maxillary 

 reaching to angle of preoperculum and not dilated. Origin of dorsal and 

 ventral nearly in same vertical, that of former midway between anterior 

 margin of orbit and adipose fin ; that of latter midway between tip of 

 snout and adipose fin; insertion of the last ray of dorsal over inter- 

 space between third and fourth rays of anal ; pectoral (unless mutilated) 

 only half as long as ventral, and its tip does not approximate the vertical 

 from its origin ; dorsal and anal similar, the former with its upper mar- 

 gin concave; adipose dorsal inserted over interspace between antepe- 

 nultimate and penultimate anal rays, and as long as ultimate dorsal ray. 

 Scales smooth, those of lateral line scarcely enlarged. 



