of the Arabian Sea . 
297 
Family Opliidiidae. 
Monomitopus, gen. nov. 
Agrees with Sirembo , Blkr., as diagnosed by Dr. Gunther 
in the ( Catalogue of Fishes/ vol. iv. p. 373, except that the 
pseudobranch he are rudimentary. 
1. Mo nom itop us n icj r ip in n e. 
Sirembo nigrvpinnis , Alcock, Ann. & Mag. Nat. Hist., Nov. 1880, 
p. 384. 
I described this species from a single, rather mutilated 
specimen from the Andaman Sea; but with a well-preserved 
and larger specimen from the Arabian Sea (Station 105) I 
find that the pseudobranchise, instead of being u thick and 
fleshy,” as originally stated, really consist of two small 
pinnules only, on each side, parts of the opercular muscles 
having been mistaken for thickened pseudobranchiae in the 
first specimen. The complete radial formula is 
B. 8. D. 95-100. A. 85-88. C. 8. P. 28. V. 1. 
Neobythites, Goode & Bean. 
2. Neobythites pterotus. 
Neobythites yten'otus , Alcock, Ann. & Mag. Nat. Hist. Sept. 1890, 
p. *210. 
A large female specimen, 11 £ inches long, from Station 
104, from which I am able to make the following corrections 
in the original description : — Eight branch iostegals ; snout 
obtusely pointed ; basal third of anal fin scaly. 
Paradicrolene, Alcock. 
3. Paradicrolene Vaillanti . 
Uicrolene introniyer , Vaillant, nec Goode and Bean ; Vaillant, Exp. Sci. 
i Travailleur ’ et 6 Talisman/ Poiss. pp. 258-262, pi. xxiii. fig. 2. 
From M. Vaillant’s most excellent and exhaustive descrip- 
tion I have no difficulty in identifying this Ophidiid. But 
though I can only dissent with diffidence from such an expe- 
rienced ichthyologist, I cannot concur in his opinion that this 
fish is identical with Dicrolene intronigra of Messrs. Goode 
and Bean. Apart from numerous minor points of disagree- 
ment, the Dicrolene type is stated to have only seven bran- 
h iostegals. 
