480 opniocEPnALTD.n. 



■with small ocelli; dorsal and anal fins with small violet ocelli at 

 the base. 



Rivers of Bandjermassing (Borneo) and of Palcmbang (Sumatra). 



a. Fine specimen. Borneo. 



23. Ophiocephalus argus. 



Cant. Ann. ^ Macj. Nat. Hist. 1842, ix. p. 484. 



D. 49-50. A. 33. L. lat. 62. L. transv. ^. 



A row of large teeth in the lower jaw, on the vomer and the pa- 

 latine bones. The height of the body is contained six times in the 

 total length, the length of the head three times and a half, the length 

 of the caudal six times and a half. In young specimens the body is 

 somewhat lower. The width of the interorbital space is nearly 

 equal to the extent of the snout, and one-sixth of the length of the 

 head. Cleft of the mouth very large, the maxUlary extending behind 

 the orbit. Shields on the upper surface of the head small. There 

 are thirteen series of scales between the orbit and the angle of the 

 prncopcrculum. The pectoral does not extend to the origin of the 

 anal fin, its length being two-fifths of that of the head ; the length 

 of the ventral fin is two-thirds of that of the pectoral. Greyish-olive 

 (in spirits), with two series of large round brown spots edged with 

 silvery. Similar ocellated spots on the upper surface of the head ; 

 a brown band edged with silvery fi-om the eye to the humeral region ; 

 another, which is interrupted, from the eye to the base of the pectoral. 



Fresh waters of China and Chusan. 



a, b, c. Adult, half-grown, and young. Chusan. From the Collec- 

 tion of the East India Company. — Tj-pcs of the species. 

 d~e, f, g, h-i, k-n. Adult, half-grown, and young. China. 



24. Ophiocephalus maculatus. 



Bostrychus maculatus, Lacep. iii. pp. 140, 143. 



Opliicephalus maculatus, Cnv. ^ Vol. vii. p. 437; Richards. Ichth. 

 thin. p. 251. 



D. 44-45. A. 28-29. L. lat. 56. L. transv. ^. Vert. 52. 



A row of large teeth in the lower jaw and on the palatine bones. 

 The height of the body is contained six times in the total length, 

 the length of the head three times and three-quarters, the length of 

 the caudal six times and a half. The width of the interorbital space 

 is equal to the extent of the snout, and nearly one-sixth of the 

 length of the head. Cleft of the mouth very large, the maxillarj^ 

 extending behind the orbit. Scales on the upper surface of the head 

 small. There are twelve series of scales between the orbit and the 

 angle of the pra^operculum. The pectoral docs not extend on to the 

 origin of the anal fin, its length being two-fifths of that of the head ; 

 the length of the ventral fin is two-thirds of that of the pectoral. 



