104 Proceedings of the Rojjal Irish Academy. 



ill the axilla of the pectoral, which are cycloid, with no radiating ridges. 

 Tail tapering to a fine point. In the smaller Hclga specimen, which appears 

 to be complete, the total length is 5'i) times the length of the head. This 

 agrees closely with Giinther's type, in which the total length is figured as 

 being sis times that of the head. 

 - Fin rays: 1st Dorsal, II + 9 ; Pectoral, 20; Yentral, 12-13. 



First dorsal with the first spinous ray short and stout, just penetrating 

 the skin ; second ray long and strong, about three-fifths of length of 

 head, with numerous {ca. 22-2-0) fine, depressed barbs ; space between 

 first and second dorsal about four-fifths of length of head. Second dorsal 

 fin low and inconspicuous, the minute filamentous anterior rays not being 

 joined by membrane. Ventral fin with twelve rays in the larger, and 

 thirteen in the smaller Irish specimen, the first ray being stout and produced 

 into a filament which reaches to about the seventeenth anal ray. 



Colour in formaline light brown, the fleshy portions of the head being an 

 opaque white, and the deep black of the opercular membranes showing 

 through the slightly transparent gill cover. 



In addition to the two large specimens above mentioned, a young 

 specimen from station S.E. 593, 670-770 fathoms, also belongs almost 

 certainly to this species. Its length is 77 + a; mm., at least 5 mm. being 

 missing from the end of the tail. The length of head is 13 mm. The 

 snout is more pioniinent than in large specimens, having in lateral view the 

 form of a sharp tubercle from which a median dorsal and a paired lateral 

 ridge run backwards. The lateral ridge runs from the lip of the snout 

 through the nasal tubercle towards the centre of the eje, and dips abruptly 

 at the orbit below the eye. This ridge is deeply hollowed between the rostral 

 and nasal tubercles, making the former acute in dorsal view. The first 

 dorsal has II + 9 rays, the elongate spinous ray tapering to a minute filament, 

 and having six slender diverging spines on its distal two-thirds. The scales 

 are all missing. The space between the first and second dorsal fins is 

 proportionately less than in the larger specimens, but not so small as in 

 C, meclitcrrancus. The barbel is verv small. 



