72 



Length between 4 and 5 inches. 



Very numerous specimens from off the Ganjam coast, 98 to 102 fathoms, 

 and 107 fathoms. 



Regd. Nos. 12729 et seq. 



Ambltopus, Cuv. & Val. 

 53. Amhlyopus arctocephalus, Alcock. 



AmUyopus arctoce-phalus, Alcock, Ann. Mag. Nat. Hist., Dec. 1890, p. 432 : Illdstr4TI0N8 OF the ZooLoGT 

 OP THE iNVESTiGiTOR, FiSHES, PL. XX. FIG 7 {eijc far too distinct). 



D. VI. 43. A. 41. Scales 50-60 rows. 



Head angular, its opercular region somewhat inflated, its vertex compressed 

 into a sharp carina, its length one-sixth of the total, caudal included. 



Body compressed, its height, which is 7 to *7-^ in the total, caudal included, 

 diminishes very slightly from nape to base of caudal. Eyes completely hidden 

 and aborted, though the optic nerve is distinct. 



Snout broad, with the lower jaw prominent. Mouth-cleft oblique, rather 



wide, the length of the maxilla being 2^ m that of the head ; the upper lip with 



a short broad barbel on each side; the mandibular symphysis prominent. In 

 each jaw a row of small, close, even, acute teeth, and external to these in the 

 front of the premaxilla, on each side, two large canines, and in the mandible 

 five, of which two are lateral and one (the largest) median. 



Head naked ; body covered with thin, smooth, hardly imbricate scales, 

 which increase in size from before backwards. 



Dorsal and anal fins low, enveloped in skin, confluent with the pointed 

 caudal. Pectorals with the four or five upper rays as long as the maxilla, the 

 lower rays extremely short. Ventrals jugular, small, cohering ; their length 

 varies from nearly two-thirds to not quite one-third the body-height. 



Stomach large, saccular ; no pyloric CEeca. A large, globular, thick-walled 

 air-bladder. Anal papilla large, bilobed. Eleven abdominal, seventeen caudal 

 vertebrae. 



Colours in life mottled pink, fins hyaline. 



Length 5 inches. 



Off Orissa coast, 50 fathoms, off Vizagapatam, coast 20 to 25 fathoms, off 

 Indus Delta 137 to 131 fathoms. 



Regd. Nos. 12926-12931, 13457-13459, ^^ ^^^. 



In the drawing the artist has mistaken the dissected orbit for the eye. As 

 a matter of fact the eye-ball is indistinguishably fused with the connective-tissue 

 of the orbit, though the optic nerve is of normal size. 



