Indian Deep- sea Fishes, I 17 



Family Stomiatidse. 



Thaumastomias. 



Thaumastornias atrox, Alcock. 



Thaumastomias atrox, Alcock, Ann. & Mag. Nat. Hist., Sept. 1890, 

 p. 220, pi. viii. fig. 7. 



Liitken (Dansk. Vid. Selsk. Skr. 6 Raekke, Nat. Math. 

 Afd. vii. G, p. 281, 1892) and Collett (Poissons des Cam- 

 pagnes du yacht ' l'Hirondelle,' p. 131) consider that this 

 species is identical with Photostonrias Guernei of the latter 

 author. If it were so, it would be very interesting to find 

 another species common to the Azores and the Andamans 

 and Bay of Bengal. 



But, although the two forms are possibly congeneric, they 

 are specifically quite distinct. Our two specimens, which 

 are unusually perfect and well-preserved, have neither lingual 

 teeth nor barbel, and have only a single short row of teeth on 

 either palatine. The luminous organs also are different in 

 the two species. 



Family Sternoptychid®. 



DlPLOPHOS, Giinther. 



Diplophos corythceolurri) sp. n. 



B. 12. D. circ. 11. A. circ. 24. P. 10. V. 7. 



Length of head about one fourth, height of body between 

 one fifth and one sixth of the total without the caudal. 



The snout, which has the lower jaw prominent, is hardly 

 longer than the eye, which is not quite a fourth the length of 

 the head. The eyes are not quite a diameter apart. 



The maxillary almost reaches to the preopercular angle. 

 There is a single row of small, rather distant, acicular fangs 

 of unequal size in either jaw, and a row of close-set acicular 

 teeth on part of the palatines ; the whole surface of the meso- 

 pterygoids is studded with sharp little denticles. 



Gill-openings extremely wide; four gills with short 

 laminae ; gill-rakers, especially those on the first arch, long 

 and bristle-like. 



The body has evidently been covered with large thin and 

 deciduous scales. 



The dorsal fin arises about an eye-length behind the base 

 of the ventrals, and its last few rays are just above the Hist 

 few anal rays; its first ray is slightly nearer to the snout 



