48 SILT7RID.E. 



eye and angle of the operculum. The anal is united with the hase of 

 the caudal. Sometimes a blackish spot behind the gill-opening. 

 Sumatra and Banka. 



a. One of the typical specimens. From Dr. P. v. Bleeker's Collection. 



7. Callichrous camo. 



Silurus canio, Ham. Buch. pp. 151, 374. 



duda, Ham. Buch. pp. 152, 375. 



mysoricus, Cuv. §• red. xiv. p. 364 ; M'Clell. Calc. Journ. iv. p. 402. 



D. 4. A. 69-73. P. 1/12. V. 8. 



The maxillary barbels extend nearly to the middle of the fish ; 

 pectoral spine not denticulated. Vomerine teeth in an interrupted 

 band. Sides immaculate. (H. B.) 



North-eastern Bengal, Mysore, and Chusan. 



8. Callichrous pabo. 



Silurus pabo, Ham. Buch. pp. 153, 375. tab. 22. fig. 48. 

 D. 5. A. ca. 73. P. 1/16. V. 8 *. 



The height of the body is contained four times and a third in the 

 total length (without caudal) ; pectoral spine denticulated interiorly ; 

 the anal terminates at a short distance from the caudal. Barbels short, 

 those of the maxillaries scarcely extending beyond the eye ; the lower 

 jaw is the longer ; vomerine band interrupted in the middle. (H. B.) 



Brahmaputra. 



** The vomerine teeth in an uninterrupted band. 



9. Callichrous hypophthalmus. 



Silurodus hypophthalmus, Block. Prodr. Silur. p. 272, and Ail. Ichth. 

 Sflur. p. 83. tab. 88. fig. 2. 



D. 4. A. 76-82. P. 1/12. V. 7. 



Dorsal fin exceedingly narrow ; the anal terminates close to the 

 caudal, but is separate from it ; the pectoral extends to the ninth 

 anal ray and is not shorter than the head, the length of which is 

 contained five times and two-fifths to six times in the total. Pectoral 

 spine of moderate strength, two-thirds of the length of the head, 

 slightly denticulated at its inner edge. The diameter of the eye is 

 one-fourth of the length of the head. The lower jaw is the longer ; 

 vomerine teeth in a very narrow, uninterrupted band ; the maxillary 

 barbel extends to the anterior portion or to the middle of the anal. 

 A. blackish spot behind the gill-opening. 



Java and Sumatra. 



a. Adult. From Dr. P. v. Bleeker's Collection. 



b. Seven inches long. Purchased of Mr. Frank. 



* Hamilton Buchanan states ten ventral rajs in the text, whilst the figure 

 represents eight only ; the latter appears to me to be the correct number. 



