of the Bay of Bengal. 211 



narrow ; nine very long scabrous gill-rakers on the middle of 

 the first branchial arch besides rudimentary ones above and 

 below ; each pseudobranchia consists of two small pinnules. 



Head, body, base of pectoral fin, and basal two thirds of 

 dorsal covered with small adherent scales ; between the base 

 of the dorsal and the vent there are thirty rows. 



Dorsal fin much higher than the anal ; its rays, the longest 

 of which are half the maximum body-height, are imbedded 

 in a thick gelatinous tissue covered with scaly skin, in their 

 basal two thirds. Caudal narrow, its length is a little more 

 than that of the postrostral portion of the head ; it projects 

 freely beyond the other vertical fins, with which it is con- 

 nected only at its base. Pectorals entire, their bases fleshy 

 and free, their rays long and delicate, reaching the origin of 

 the anal fin. The ventrals arise behind and above the pectoral 

 symphysis, their bases separated by an interspace about equal 

 to I the diameter of the eye ; each consists of two short fila- 

 ments, of which the outer is a little the longer. 



Stomach siphonal ; intestine much coiled ; no pyloric 

 caeca; air-bladder developed; peritoneum deeply pigmented 

 throughout. 



Colours in the fresh state : — Body chocolate ; head, abdo- 

 men, and all the fins black. 



Total length 85 inches. 



Hah. Vide Station 97. Only one specimen. 



Bathyonus, Gthr. 



14. Bathyonus ylutinosus, sp. n. 

 Allied to Siremho oncer ocephalus, Vaillant. 

 B.8. D. circ. 125. A. circ. 105. V. 1. P. 29-30. C. 10. 



Head and body in spirit much compressed, but in the fresh 

 state, owing to the presence of a uniform thick subcutaneous 

 layer of mucus, rounded and subcylindrical ; tail long and 

 tapering. 



Length of the head greater than that of the rest of the 

 trunk, or about 5^ in the total without the caudal, the length 

 of the entire trunk being about one third of the same standard 

 and 2| times the maximum body-height or head-depth ; an- 

 terior third of the head somewhat abruptly depressed, its 

 vertical profile forming an arc of a much smaller ellipse than 

 that of the posterior part of the head. Snout depressed, 

 rounded, somewhat inflated at the tip ; its length, which is 

 less than its breadth, is one fifth the length of the head. 



