Synopsis of the species. 



I. Barbel 3 times longer than head. Tongue with teeth. 

 31 luminous organs in the ventral series between pec- 

 torals and ventrals, 28 in the lateral series from gill- 

 opening to vertical through ventrals M. melanops p. 114. 



II. Barbel shorter than head. Tongue without teeth. 27 

 luminous organs in the ventral series between pectorals 

 and ventrals, 24 in the lateral series from gillopening 

 to vertical through ventrals M. valdiviac p. 115. 



i. Melanostomias melanops Brauer. 



Melanostomias melanops Brauer, Zool. Anz. XXV. 1902, p. 284. Deutsche 

 Tiefsee-Exp. Tiefseefische 1906. p. 53. 



Fig. 41. Melanostomias melanops Brauer (after Brauer). 



B. 12; D. 14; A. 17; P. 5; V. 8. 



Height 7, head nearly 7; diameter of eye *?\ v slightly more 

 than length of snout. Barbel 3 times as long as head, thick, 

 its distal part lamellated, ending in a thin filament. Pectorals 

 shorter than half head, ventrals nearly at the beginning of 

 the last '/ 3 of the body, longer than head, reaching to anus. 

 8 intermaxillary teeth, the first and third small, the other 

 ones longer, the fifth the largest. A group of 5 teeth in the 

 maxilla, equal to the large intermaxillary teeth, behind them 

 about 24 small close-set teeth, directed backward, n mandi- 

 bulary teeth, the first two and the fourth small, the third the 

 largest, the rest in two groups, in which the height increa- 

 ses posteriorly. All large teeth bicuspid and depressible. 

 Vomer with one pair of teeth, palatines with 4, tongue with 

 two teeth. The ventral series of luminous organs consists of 

 8 near isthmus, 31 from pectorals to ventrals, u from ven- 

 trals to anal, 12 from there to caudal. In the lateral series 

 28 from gillopening to vertical through ventrals, 12 from here 

 to vertical through anal. Velvety black. Eye black. Base 



