574 Bulletin 47, United States National Museum. 



lateral line considerably enlarged. Northern seas. (/3ev6oe, the ocean 

 depths; ov/ua, a constellation of stars.) 



a. Posterolateral spot 1 on each side; anal spots nearly in a straight series; caudal spots not 



close together. MULLERI, 862. 



aa. Posterolateral spot wanting; caudal spots close together; anal spots in a series nearer 



horizontal than vertical; snout rather sharp. AECTICUM, 863. 



862. BENTHOSEMA MULLERI (Gmelin). 



Head 4 ; depth 4. D. 12 to 14 ; A. 16 to 18 ; V. 8 ; scales 36 to 40. Depth 

 of head equal to its length. Eye large, its diameter more than & length 

 of head. Snout very short, obtuse, with upper profile descending in a 

 very strong curve. Cleft of mouth oblique; maxillary reaching to angle 

 of preoperculum and terminating in triangular dilation . Origin of dorsal 

 a little nearer tip of snout than root of caudal, and inserted well behind 

 root of ventral ; pectoral very small, its length equal to diameter of eye; 

 ventral not reaching to the vent. Scales smooth, those of lateral line 

 larger. A luminous spot on the angle of the preoperculum ; mediolater- 

 als 2, in subhorizontal line continuously with the 2 anterolaterals ; pos- 

 terolateral 1, over break in series of anals ; superanals 6-7 -f- 8-9. (Goode 

 & Bean.) North Atlantic, occasionally taken in deep water from Norway 

 to Greenland, more abundant southward, to South Carolina, probably 

 always in very deep water. (Named for Otto Friedrik Muller, an early 

 writer on the fishes of Denmark.) (Eu.) 

 Salmo miilleri, GMELIN, Syst. Nat., 1378, 1788, Norway; after STROM. 



Scopelus glacialis, REINHARDT, Overs, 36, 1835, Greenland; LUTKEN, Spolia Atlantica, 30, 1892. 

 Scopelus miilleri, COLLETT, Norsche-Nord-Havs Exp., 158, 1880; LILLJEBOBG, Sveriges och Norgea 



Fiskar, vi, 20, 1889. 



Myctophum glaciale, JORDAN & GILBERT, Synopsis, 283, 1883. 

 Benthosema miilleri, GOODE & BEAN, Oceanic Ichthyology, 76, 1895. 



863. BENTHOSEMA ARCTICUM (Liitken). 



Head 3f; depth 4. D. 9; A. 17. Posterolateral spot (near lateral line, 

 above last part of anal) entirely wanting, the anal spots forming a con- 

 tinuous line, 15 or 16 in number; caudal spots 2, close together; supra-anal 

 spots 3, forming an oblique line; preopercular margin almost vertical. 

 Body stout, short, the caudal peduncle not slender, the snout not project- 

 ing beyond chin; eye moderate; dorsal fin high. Davis Straits, Green- 

 land. (Liitken.) 

 Scopelus arcticus, LUTKEN, Spolia Atlantica, Scopelini, 29, 1892, Davis Straits. 



268. DASYSCOPELUS, Giinther. 



Dasyscopelus, GUNTHER, Cat. Fish. Brit. Mus., v, 405, 1864, (asper). 



Dorsal and anal fins touching the same vertical, but not overlapping. 

 Scales hard, persistent, ctenoid, those of lateral line much enlarged. Anal 

 terminating below adipose dorsal. Body elevated, somewhat compressed ; 

 caudal peduncle rather slender ; luminous scales on the back of the cau- 

 dal peduncle. Arrangement of photophores much as in Myctophum. 

 Species few; remarkable for the firm, rough scales. (<5aai>f, rough ; Scope- 

 lus: Scopelus is an old name of some large-eyed fish, from cr/coTrew, to look.) 



a. Jaws subequal; anal spots 12 to 14; supra-anal spots in an oblique series. SPINOSUS, 864. 



