of the Arabian Sea. 297 



Family Opliidiidse. 

 MONOMITOPUS, gen. nov. 



Agrees with Sir'emho, Blkr., as diagnosed by Dr. Glintlier 

 in the 'Catalogue of Fishes/ vol. iv. p. 373, except that the 

 pseudobranchise are rudimentary. 



1. Monomitopus nigrtpmne. 



Sirembo nigripinnis, Alcock, Ann. & Mag. Nat. Hist., Nov. 1889, 

 p. 384. 



I described this species from a single, rather mutilated 

 'specimen from the Andaman Sea ; but with a Avell-preserved 

 and larger specimen from the Arabian Sea (Station 105) I 

 lind that the pseudobranchi^, instead of being " thick and 

 flesliy," as originally stated, really consist of two small 

 piimules only, on each side, parts of the opercular muscles 

 having been mistaken for thickened pseudobranchia? 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 j^terotus, 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 branchiostsgals ; snout 

 obtusely pointed ; basal third of anal fin scaly. 



Paeadiceolene, Alcock. 



3. Paradicrolene Vaillanti. 



Dicrohne introniger, Vaillant, nee Goode and Bean ; Vaillant, Exp. Sci. 

 ' Travailleur ' et ' Talisman,' Poiss. pp. 258-263, 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- 

 hiostegals. 



