] . opuiocErnALrs. 473 



ish-brown, mth a red band running from tbe eye to the caudal ; 

 fins blackish ; dorsal with yellowish streaks posteriorly ; ventrals 

 greenish. (Bleeh.) 



llivers of Sambas (Borneo). 



This species is founded upon a single, apparently young specimen. 



6. Ophiocephalus mystax. 

 Blocker, Natimrk. Tijdschr. Nedo-l. Lid. 1853, v. p. 188. « 



D. 38-39. A. 22. L. lat. 50. 



Several larger teeth in the lower jaw. The height of the body is 

 contained eight times in the total length, the length of the head four 

 times to four times and a fourth, the length of the caudal five times 

 and a third. The maxillary extends to behind the orbit. The length 

 of the pectoral is two-thirds of tliat of the head, the length of the 

 ventral two-fifths. Bro"miish-grecn : head with yellow spots infe- 

 riorly ; a brown streak from the jaw to the interoperciilum. Fins 

 brownish : anal with red margin ; ventrals yellow. (BL) 



Rivers of Banka. 



7. Ophiocephalus melanosoma. 



Ophicephalus melasonia, BIccker, Borneo, v. p. 424, and Natuurk. 

 Tijdschr. Nederl. Lid. v. 1853, p. 189. 



D. 40-42. A. 25-26. L. lat. 54-55. L. transv. 4/11. 



Several larger teeth in the lower jaw. The height of the body 

 is contained eight times and a half or nine times in the total length, 

 the length of the head fom* times or four times and a fourth, the 

 length of the caudal five times and two-thirds. There are nine series 

 of scales between the orbit and the angle of the praeoperculum. The 

 maxiUary extends behind the orbit. The pectorals are two-thirds of 

 the length of the head, the ventrals two-thirds of that of the pectoral. 

 Blackish-brown, fins black ; the lower parts of the head, the belly, 

 the ventrals, and the base of the anal whitish, with dark-brown spots. 



Borneo. Banka. Nias. 



a. Fine sjjecimen : seventeen inches long. Borneo. 



b. Adult : stuffed. Borneo. Purchased of Mi-. Frank. 



8. Ophiocephalus melanopterus. 

 Bleeker, Borneo, ix. p. 420. 



D. 45. A. 30. L. lat. 55. 



Several larger teeth on each side of the lower jaw. The height of 

 the body is contained seven times in the total length, the length of 

 the head five times, the length of the caudal fin five times and a half. 

 The maxillary extends behind the orbit. Ventrals half as long as 

 pectorals. Violet-ohve, fins darker ; the posterior half of the dorsal 

 and the entii-e anal with oblique blue stripes ; the basal half of the 

 caudal blue-dotted. {Bleelc) 



River Kapuas (Borneo). 



