1 70 silttrid^. 



head ; their spine is strong, and shorter than 'that of the dorsal fin. 

 Caudal fin with the lobes pointed, nearly one-sixth of the total length. 

 Adipose fin with a large black spot, the other fins yellowish. 

 Java and Sumatra ; Pinang. 



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

 b-c. Half-grown : skins. Pinang. From Dr. Cantor's Collection. 

 d. Young. East Indies. From the Collection of the East India 

 Company. 



57. Arius cochinchinensis. 



D. 1/7. A. 16. P. 1/11. 



The length of the head is contained thrice and two-thirds in the 

 total (without caudal). Head slightly granulated 

 above ; occipital process rather broader than long, 

 subtriangular, with the apex truncated, with a slight 

 ridge along the middle, and with the lateral margins 

 straight. The teeth on the palate are granular, form- 

 ing two separate subovate, oblong patches, 

 slightly convergent behind. The maxillary 

 barbels extend to the end of the head, and are black. 

 Dorsal spine rather slender, as long as the head without 

 snout, serrated behind, and terminating in a long soft 

 filament ; adipose fin short, black. Pectoral fin much 

 shorter than the head, with its spine rather stronger and 

 shorter than that of the dorsal fin. 

 Cochinchina. 



a. Seven and a half inches long : skin. Purchased. 



58. Arius microcephalus. 



Arhi3 microcephalus, Iileek. Nat. Tydsckr. Nederl. Ltd. ix. p. 423, and 



Prodr. Silar. p. 77. 

 Pseudarius microcephalus, Bleek. Ail. Ichth. Silttr. p. 37. tab. 51. fig. 1. 



B.5. D. 1/7. A. 19. P. 1/10. 



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

 times and three-quarters in the total length (without caudal), the 

 length of the head four times or four times and a fifth ; head granu- 

 lated above, broader than high, its greatest width being four-fifths 

 or five-sixths of its length ; occipital process scarcely longer than 

 broad, subtriangular. The band of intermaxillary teeth is thrice as 

 long as broad ; teeth on the palate rather large, molar-like, forming 

 two separate subovate patches - . The maxillary barbels extend some- 

 what beyond the head. Dorsal fin higher than the body ; its spine 

 is strong, scarcely shorter than the head, and serrated along both 

 edges ; adipose fin nearly as long as dorsal. Pectorals scarcely shorter 

 than the head; their spine is somewhat shorter than that of the 

 dorsal fin. Adipose fin with a large black spot. 



Bandjermasin. 



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



