90 siLURms. 



5. Liocassis stenomus. 



Bagrus stenomus, (Kuhl §• v. Hass.) Cuv. Sf Vol. xiv. p. 415. 

 Leiocassis ellenriederi, Bleek. Act. Soc. Sc. Indo-Nederl. ix. p. 11. 

 stenomus, Bleek. Atl. Ichth. Silur. p. 54. tab. 67. fig. 3. 



B. 9. D. 1/7. A. 15. P. 1/7. 



The height of the body is nearly one-sixth of the total length 

 (without caudal), the length of the head two-ninths; head broader 

 than high, and nearly as broad as long. The occipital process is tri- 

 angular, and reaches just to the basal bone of the dorsal fin ; the 

 upper jaw projects a little beyond the cleft of the mouth, which is 

 slightly curved. The maxillary barbels and the outer ones of the 

 mandible are longer than the head. Pectoral spine considerably 

 longer and stronger than that of the dorsal fin ; the length of the 

 adipose fin is equal to that of the dorsal, but much less than the space 

 between the two fins. Caudal deeply forked, with the lobes pro- 

 duced into filaments. 



Java and Sumatra. 



a. From Dr. P. v. Bleeder's Collection. 



34. BAGROIDES. 



Bagroides, Bleek. Nat. Tydschr. Nederl. Ind. ii. p. 204. 

 Bagroides et Pseudobagrichthvs, Bleek. Nederl. Tydschr. Dierk. 1863, 

 p. 94. 



Adipose fin long ; a short dorsal fin with a pungent spine and seven 

 soft rays ; anal fin short, with less than twenty rays. Barbels eight. 

 No labial teeth ; teeth on the palate in an uninterrupted band or 

 patch. Head covered with thick skin ; eyes beloAV the skin. No 

 free circular fold round the orbit. Dorsal spine serrated, the teeth 

 pointing upwards ; caudal fin forked ; ventrals with six rays. Gill- 

 membranes united below the throat, but not grown to the isthmus, 

 with a very shallow notch behind. 



Sumatra and Borneo. 



a. Adipose fin about as long as the head ; vomerine teeth in a subtrian- 

 gular patch which is rounded anteriorly : Bagroides, Blkr. 



1. Bagroides melanopterus. 



Bleeker, Nat. Tydschr. Nederl. Ind. ii. p. 204 ; Prodr. Silur. p. 134 ; and 

 Atl. Ichth. Silur. p. 51. tab. 66. fig. 3. 



B. 7-8. D. 1/7. A. 16-17. P. 1/9. 

 The height of the body is contained four times in the total length 

 (without caudal), the length of the head four times and a third or 

 five times ; head as broad as high, its greatest width being contained 

 once and a fourth in its length. Upper jaw prominent. The teeth 

 on the palate are obtuse. Barbels shorter than the head without 

 tentacles ; lateral line with filaments anteriorly. Dorsal fin lower 

 than the body • its spine is strong, generally shorter than the head, 

 striated. Adipose fin twice as long as the dorsal, the length of which 



