9. SILURICHTHYS. 35 



9. SILTJRICHTHYS* 



Silurichthys, Bleek. Prodr. Silur. p. 268. 



One very short dorsal fin, without pungent spine ; no adipose fin ; 

 anal and caudal fins confluent. Barhels four : one to each maxillary 

 and one to each mandible. Palatine teeth none ; vomerine teeth in 

 a short transverse band ; eyes rather small, above the angle of the 

 mouth. Nostrils remote from each other, subequal in form and width. 

 Head and body covered with soft skin. The upper profile of the head 

 straight. The dorsal fin is inserted above, or immediately before, the 

 ventrals. Ventrals composed of eight or less rays ; caudal obliquely 

 emarginate. 



East Indian Archipelago Cashmere. 



1. Silurichthys phaiosoma. 

 Bleeker, Prodr. Silur. p. 269, and Ail. Ichth. Silur. p. 81. tab. 87. fig. 2. 

 D. 4. A. 53-56. P. 1/8-10. V. 6-8. 



The height of the body is contained six times, or six times and a 

 half, in the total length (without caudal), the length of the head six 

 times and a half to seven times and a fourth. The lower jaw is 

 scarcely shorter than the upper. The mandibulary barbels are shorter 

 than those of the intermaxillaries, the latter extending to the middle 

 third of the anal fin. The pectoral is nearly as long as the head, the 

 length of the spine being equal to the distance between the eye and 

 the angle of the operculum ; the spine denticulated posteriorly. Dorsal 

 above, the ventrals. Caudal fin obliquely emarginate, with the lobes 

 rounded. Uniform brown ; barbels with brown rings. 



Banka, Biliton, and Borneo. 

 a. Type of the species. From Dr. P. v. Bleeker's Collection. 



2. Silurichthys hasseltii. 



Bleeker, Prodr. Silur. p. 270, and Atl. Ichth. Silur. p. 82. tab. 87. fig. 1. 

 D. 4. A. 58. P. 1/9. V. 6. 



The height of the body is contained six times and a half in the total 

 length (without caudal), the length of the head seven times and two- 

 thirds. Jaws equal anteriorly. The mandibulary barbels are shorter 

 than those of the intermaxillaries, the latter extending to the middle 

 third of the anal fin. The pectoral fin is nearly as long as the head. 

 The dorsal is inserted before the vertical from the ventrals. Caudal 

 obliquely truncated, scarcely emarginate. Brownish, marbled with 

 black. (Bl.) 



Java (Tysekat). 



The single specimen known is in the Leyden Museum. 



* 1. Silurus sinensis (? LarSp. v. p. 82. pi. 2. fig. 1), M'Clell. Calc. Jonm. iv. 

 p. 402.— Chusan. 



d2 



