362 Mr. A. Alcock on Indian Bathyhial Fishes. 



Small pseudobranchias consisting of three or four pinnules 

 are present. 



Family Halosauridae. 



Halosaueus, Johnson. 



22. Halosavrus parvipennis, sp. n. 



B. 13. D. 9. P. 12-13. V. 1/9. L. tr. f. 



8 



The length of the head is a little over one eighth of the 

 total, or about two fifths the length of the rest of the trunk. 



The length of the snout, of which nearly half is preoral, is 

 two fifths that of the head, or equal to that of the postocnlar 

 portion of the head. The eyes are separated by one fourth 

 of a diameter only, their diameter being one half the length 

 of the snout. The weak maxillary does not quite reach to 

 the vertical through the anterior border of the orbit. Villi- 

 form teeth in bands in the jaws and palatines and in a nar- 

 rowed band on the pterygoids. 



Gill-rakers distant, short. 



I'he dorsal fin arises from a scaly base about an eye-length 

 behind the ventrals, which arise, also from scaly bases, a 

 head-length and a quarter behind the gill-opening ; about 

 half a head-length behind the dorsal fin is an erectile scale as 

 long as the eye. The weak, narrow, pointed pectorals are 

 but little longer than the snout. 



The scales of the lateral line are much more adherent than 

 those of the rest of the body, though but little larger. 



There are eight or nine small pyloric appendages in a row 

 embracing the ascending limb of the siphonal stomach. 



Colours : light sepia-brown, fins darker ; opercles silvery ; 

 throat and branchiostegal membranes black. 



A female, about 15 inches long, with gravid ovaries, from 

 Station 122, 865 to 880 fathoms. 



Family MuraBnidae. 



CONGROMUE^NA, Kaup. 



23. Congromurcena longicauda^ Alcock. 



Congromurcena longicauda, Alcock, Ann. & Mag. Nat. Hist., Dec. 1889, 

 p. 455. 



This species seems to be characteristic of the Bay of Bengal 

 between 200 and 300 fathoms. 



