1896.] A. Alcock — Supplementary List of Indian Fishes. 307 



strongly adherent. Cleft of mouth very wide : premaxilla very long, 

 tapering, firmly attached to the long thin maxillas. A single row of 

 small teeth in the premaxilla : a double row of teeth in the mandible, 

 the inner row being large depressible and barbed at tip ; an incompletely 

 double series of similarly enlarged teeth on either palatine, and a long 

 narrow row of almost similar teeth on the tongue and hyoid. Eye 

 large. Gill-openings very wide, gill-membranes not attached to the 

 isthmus, branchiostegals not very numerous (about 6 ?) ; pseudo- 

 branchiae large. 



The dorsal fin is short, it arises well in the anterior third of the 

 body (measured with the caudal) and all its extent lies between the 

 pectorals and ventrals : the anal is long, occupying the greater part of 

 the tail. Pectorals large. Ventrals with 8 rays. An adipose dorsal 

 fin. Caudal forked. No luminous spots. 



This is a remarkable generalized form of Scopeloid, showing affini- 

 ties with Saurus, Ghlorophthalmus, Scopelus, Odontostomus, and Paralepis. 

 To casual view it looks just like a Scopelus devoid of luminous organs. 



8. t Scopelarchus Guentheri, n. sp. 

 D.9. A.26. P.19. V.8. L. lat. (of enlarged adherent scales) 



circ. 



60. 



Head and body compressed : shape as of Scopelus. 



Length of head (with gill-cover) not quite one-fourth, height of 

 body about two-elevenths of the total (without caudal). Snout about 

 three-fourths the length of the eye : the lower jaw in repose fitting 

 within the upper. The eyes are large — between one-third and one- 

 fourth the length of the head — they are separated from one another 

 by a mere linear space, and their visual axis is rather more superior 

 than horizontal. 



The mouth-cleft forms a slightly oblique sweep, and the maxilla 

 extends a considerable distance behind the posterior border of the 

 orbit. 



The scales of the lateral line are much enlarged, and their vertical 

 diameter is much greater than their antero-posterior diameter, each is 

 chambered, the chamber opening dorsally and ventrally. 



The first dorsal ray arises about an eye-length behind the base of 

 the pectorals, the last stands a little in advance of the base of the 

 ventrals. The first anal ray arises near the middle of the body 

 (measured with the caudal), the last is less than an eye-length distant 

 from the rudimentary rays at the base of the caudal. The adipose 

 fin stands in the posterior third of the distance between the dorsal and 



t 111. Zool. Investigator, Fishes pi. xvii. fig. 7 {in 'preparation). 



