160 SILURID^. 



of the total length (without caudal), the length of the head one- 

 foiirth ; head broader than high, its greatest width being contained 

 once and a fourth or once and a third in its length. The diameter of 

 the eye is one-fourth of the length of the head, and more than one- 

 half of the width of the interorbital space. Occii)ital process trian- 

 gular, rather longer than broad, Avith a keel along its middle ; basal 

 bone of the dorsal spine smaU. Snout not much longer 

 than the ej'e. Teeth on the palate villiform, forming- 

 two triangular patches, which are somewhat smaller 

 than the eye, as long as broad, and approximate to each 

 other anteriorly, their points being directed backwards. 

 The maxillary barbels extend to, or beyond, the root of the pectoral. 

 The soft dorsal fin is higher than the body ; its spine is as long, or 

 nearly as long, as the head, serrated behind, and terminating in a soft 

 filament. Adipose fin shorter than the dorsal. Pectoral spine nearly 

 as long as that of the dorsal fin. Fins yellowish. 

 East Indian Archipelago. 



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



38. Arius utik. 



Anus utik, Bleek. Verh. Bat. Gen. xxi. Silur. Batav. p. 40, and Atl. 



Ichth. Silur. p. 34. tab. 51. fig. 2. 

 Cephalocassis utik, Bleek. Proclr. Silur. p. 115. 



D. 1/7. A. 18-19. P. 1/10. 



The height of the body is contained five times and a quarter or four 

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

 length of the head thrice and a half; head broader than high, its 

 greatest width being two-thirds of its length. The diameter of the 

 eye is one-fourth or one-fifth of the length of the head, and rather 

 more than one-half of the width of the interorbital space. The oc- 

 cipital process is triangular, but little longer than broad, slightly 

 granulated, and provided with a median keel. Basal bone of the 

 dorsal spine small. Snout longer than the eye. The „^ — ^^^ 

 teeth on the palate are villiform, forming two trian- C-^^ ^-O' 

 gular patches, the point of which is obliquely directed /^ Cx 

 forwards; these patches are much smaller than the ^^"^ ^ 



eye. The maxUlary barbels extend to the root of the pectoral. The 

 soft dorsal fin is higher than the body ; its spine is slender, two- 

 thirds of the length of the head, serrated behind, and terminating in 

 a soft filament. Adipose fin rather shorter than dorsal. Pectoral 

 spine slender, nearly as long as that of the dorsal fin. Fins yellowish. 



Java. 



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



