170 
Fam. HALOSAURIDAE. 
Halosaurus niger, n.sp. 
(Plate LI.) 
Br..32: (Dete.  Vo se eee ee 
The length of the head is greater than its distance from the 
ventrals, is equal to its distance from the dorsal, and is 63 times 
in the length of the body (about 2 feet). Snout produced, a 
little less than post-ocular part of the head, its pre-oral portion 
being 4 of itslength. The eye is contained a little over 5 times 
in the snout, and nearly 2} times in the interocular width. 
The height of the body equals the distance between the centre 
of the eye and the pectoral fin or nearly 12 times in the total 
length. The maxillary reaches to the front margin of the eye. 
Scales of the lateral line enlarged, provided with photophores. 
No scales on the region between the base of the skull and the 
tip of the snout. The dorsal fin has large scales on the basal 
part of its rays, and these are present also on the anal but ap- 
parently not on the pectoral or ventral. 
The dorsal is situated slightly behind the ventral, which is 
about the same distance behind the tip of the pectoral. Ven- 
trals short, about half the length of the pectorals, broad and 
close together, their bases under the roth scale of the lateral line. 
Colour : Black. 
Specimens were procured as follows :— 

Procured. | 
Depth, 
ence No. | Locality. | fathoms 
By. No. | 
17,293 Cape Point, E. } N., 41 miles : Shrimp trawl. | 1 | 890+} 
16,893 | Cape Point, N.E. by E. } E., 4o | _ I |800-900 
| / 
' 
miles. 
16,937 Cape Point, N.E. by E. 4 E., 40 | RA | ‘8300-900 
if Pe | 
A small specimen, about 12 cm. in length, was procured :— 

17,257. | Cape Point, E. } N., 42 miles oe | Shrimp trawl. I | 930 

This last seems to belong to the same species as the others, 
but the head is black, the body white, and the snout longer. 
