of the Arabian Sea. 309 



Stoniacli subsiplional ; intestine long, coiled in a spiral ; 

 four small pyloric caica, arranged in a ring. No air-bladder. 

 Keproductive glands very large, appai'cntly discharging in 

 the male (?) through a well-developed post-anal papilla. 



Colours in the fresh state : — Head snow-white, iris black, 

 body chocolate, fins blackish grey ; oro-pharyngo-branchial 

 membrane and entire peritoneum intense black. 



One specimen, apparently a male near maturity, measuring 

 11 inches in length. 



Station 104, 1000 fathoms. 



This fish differs from all described Alepocephalids in 

 having the pseudobranchiaj quite rudimentary and the ante- 

 rior bones of the head produced into a snout like that of 

 Aulastoma ; but its affinities are quite clearly Alepocephalid. 



Family Halosauridae. 

 Halosaurus, Johnson. 



13. Halosaurus affinis, Gthr. 



Halosaurus affinis, Giiuther, Ann. & Mag. Nat. Hist. 1877, vol. xx. 

 p. 444 ; and Zool. Chall. Exp. xxii. pp. 241, 242, pi. lix. fig. 13. 



Two specimens, measuring respectively 18f and 19 inches 

 in length, answer the diagnosis of this fish. 

 The radial formula is 



B. 11. D. 11-12. A. circ. 200. P. 13. V. 1/8. 



There are nine large pyloric caeca, arranged in a row like 

 the teeth of a comb along the first f inch of the intestine, 

 and embracing the ascending limb of the stomach. 



Station 104, 1000 fathoms. 



14. Halosaurus Hoskyniij sp. n. 

 Closely allied to the preceding. 



B. 10. D. 11. A. circ. 175. P. 13. V. 1,8. 



Head naked, its length | of the total, and exceeding the 

 distance between the gill-opening and the base of the ventral 

 fin by about an eye-length. 



Length of the snout 2\, in that of the head, the preoral 

 portion being not quite a half of the whole. 



The major diameter of the eye equals the width of the 

 interorbital space, and is contained 7^ times in the head- 

 length and just over 3 times in the length of the postorbital 

 portion of the head. 



Ann. <Ss Mag. N. Hist. Ser. 6. Vol. vi. 22 



