147 
1909. J R. E. Lloyd : Deep-Sea Ftsh caught by the “ Investigator” 
than the dorsal, commences anteriorly to it. The tenth ventral spine is opposite the 
first dorsal. 
The diameter of the eye, which is equal to the length of the snout, is 3^ in the total 
length of the head. The posterior end of the maxilla just reaches a vertical through 
the anterior border of the eye. The gill-covers are large and widely open ; they 
contain six branchiostegals and are covered with soft brownish black skin, like the 
cranium and snout. The gill-rakers are numerous, long, lanceolate and acute. 
Pseudobranch small. The teeth are well-developed in the premaxillæ and dentaries, 
a few small teeth on palatines and three or four minute teeth on vomer. 
In the mid-line of the back in continuation with the dorsal fin nearly up to the 
head is an empty fold of skin bearing scales as in Aulastomatomorpha. Scales through- 
out are very small and nearly circular. Stomach siphonal Eight pyloric cæca. 
The chief peculiarities are the small and numerous scales and the extension of 
the ventral fin well beyond the level of the dorsal. Both of these features are asso- 
ciated in the genera Conocar a and Aulastomatomorpha. On the whole the species 
resembles A. niger (Giinth.) more than any other species. Colour black. 
Five specimens, the longest 20 cm. in length. Stations 273, 336 and 297. Arabian 
Sea, 850, 700 and 600 fathoms. Registered Nos. -~A-, 
Alepocephalus longiceps, sp. nov. 
Illustr. Zool. ''Investigator” Fishes, plate xliv, fig. 2 (1909). 
B. 6, D. 20, A. 23, P. 10, V. 6, L.l. 52, L.tr. 5-1-6. 
The length of the head is considerably more than a third of the total without the 
caudal. The greatest height of the body — which is at the level of the pectoral fins — is 
6| in the total without the caudal. The vent is nearer the gill opening than the end 
of the tail The attachment of the ventrals is somewhat nearer to the vent than to 
the gill-opening. The dorsal and anal fins are opposite to one another. The diame- 
ter of the eye is a fifth of the length of the head. The snout is long and pointed ; its 
length is equal to the postocular length of the head. The upper jaw projects consi- 
derably beyond the lower as much as a distance equal to half the diameter of the eye. 
It is nearly horizontal when closed. The mouth is capable of wide extension. When 
closed the whole of the maxilla is in front of a vertical through the anterior border of 
the eye. The ends of the maxilla are very conspicuous and hang down slightly below 
the level of the lower jaw. 
The gill-covers are voluminous and widely open below ; one partially overlaps 
the other. They contain six branchiostegal rays, and are covered with soft black skin. 
The skin on the top of the head and snout is thin. The gill-rakers are numerous, long, 
lanceolate and acute. The gill-filaments are short and delicate. Pseudobranchs 
present but small. 
The teeth on the premaxillary and dentary are very minute ; on palatines and 
vomer present but minute. Stomach siphonal. Seven rudimentary cæca. 
