Jordan and Evermann. Fishes of North America. 567 

 264. COLLETTIA, Goode & Bean. 



ColleUia, GOODE & BEAN, Oceanic Ichthyology, 83, 1895, (rafinesquei). 



This genus is scarcely distinct from Jlthoprora, differing only in the 

 greater development of the luminous areas about the eye. These coalesce 

 into one large irregular luminous blotch, occupying whole front of head, 

 suggesting the headlight of an engine. (Named for Kobert Collett, the 

 distinguished ichthyologist of the University of Christiania.) 



a. Dorsal rays I'l; anal 15; scales 32 to 35; head 3 in length; depth 4. RAFINESQUEI, 849. 



aa. Dorsal rays 14; anal 15; scales and spots (except luminous gland below eye) undescribed; 

 head 4% in length with caudal. NOCTURNA, 850. 



849. COLLETTIA RAFINESQUEI (Cocco). 



Head 3; depth 4; eye 2|. D. 12; A. 15; scales 32 to 35. Body stout, 

 short, moderately compressed ; with a rounded, blunt snout, very large 

 mouth, and comparatively small eye; comparatively short, triangular 

 dorsal and anal, the former entirely in advance of the latter and inserted 

 very far forward. Caudal peduncle stout, its height nearly i height of 

 body. Eye moderately large ; distance between posterior margin of orbit 

 and preopercufar edge i diameter of eye. Snout very short, obtuse, keeled, 

 with profile abruptly declivous, its length diameter of eye. Cleft of 

 mouth slightly oblique, the lower jaw received within the upper. Mouth 

 rather large, the maxillary extending to angle of preoperculum and 

 behind orbit a distance equal to f diameter of eye, its posterior extrem- 

 ity not dilated, and entirely concealed under the scales of the cheek. 

 Origin of dorsal over that of ventral, considerably nearer to tip of snout 

 than to root of caudal, its last ray in advance of origin of anal ; ven- 

 tral stout and long, reaching to origin of anal ; pectoral small, reaching 

 to root of ventral ; anal origin under the twelfth scale of lateral line, 

 its last ray directly under adipose dorsal. Scales in lateral line some- 

 what enlarged, luminous. Anterolaterals 4, very irregular, the three 

 posterior ones forming an isosceles triangle, as in JE. metopoclampa ; medio- 

 laterals 3, arranged much as in Mycelium punctatum : posterolaterals 2, 

 arranged much as in jE. effulgens (perhaps only one posterolateral, if the 

 photophore immediately below it should be recognized as belonging to the 

 superanal series) ; superanals in two groups, 5 or 6 in the first, 4 in the 

 last ; precaudals 4, in nearly straight line, the last and uppermost at or 

 near extremity of lateral line, the others descending forward at an angle 

 of approximately 45 degrees with axis of body. (Goode & Bean.) (Named 

 for Constantino Samuel Rafinesque, the eccentric and gifted naturalist, 

 who first discovered the genus Myctophum, while studying the fishes of 

 Palermo.) 



Myctoplms rafiiiesquei, Cocco, Alcuni Salmon., etc., 20, 1820, Messina. 

 Scopelnt rafinesquei, GUNTHER, Cat., v, 410, 1864; LUTKEN, Spolia Atlantica, ir, 30, 1892. 

 ColleUia rafinesquei, GOODE & BEAN, Oceanic Ichthyology, 83, 1895. 



850. COLLETTIA NOCTURNA (Poey). 



Head 4| in total length, with caudal; depth 6; eye large, 3 in head, 

 D. 14; A. 15. Luminous spots undescribed. Body rather robust ; snout 

 short ; maxillary reaching beyond eye for a distance equal to f diameter 



