STLURIDjE. 185 



reach so far as the base of the occipital process, which latter is as 

 wide at its base as it is long, and reaches a narrow V-shaped basal 

 bone. Upper surface of the head granulated in groups, the occipital 

 process densely so in lines. Barbels the maxillary reach the middle 

 of the pectoral spine, the outer mandibular its base. Teeth on the 

 palate obtusely conical or granular, placed in two pear-shaped patches, 

 each as long as the eye, the large ends posterior and divergent, the 

 anterior terminating near the band on the pretnaxillaries. Fins 

 dorsal spine strong, very rugose laterally, as long as the head behind 

 the nostrils, and serrated both anteriorly and posteriorly, it has a soft 

 termination ; the length of the base of the adipose equals two thirds 

 of that of the rayed fin. Pectoral spine as long as the head excluding 

 the snout, roughened and serrated externally, denticulated internally, 

 it reaches two thirds the distance to the ventral, which does not 

 reach ftie anal. Colour base of dorsal darkish, a large black 

 blotch on the adipose fin. 



Hob. India to Java, Sumatra, and Pinang. 



197. (19.) Arins gagora. 



Pimelodus gagora, Ham. Buck. Fish. Ganges, pp. 167, 376, pi. 10, 



fig. 54. 

 Arius gagora, -Day, Fish India, p. 4G5,"pl. cvii, fig. 2 (see synon.). 



Nffct-youn, Burmese. 

 B. vi. D. 1/7 | 0. P. 1/10. V. 6. A. 18 (5-6/13-12). C. 17. 



Length of head 4 to 4^, of caudal fin 5| to 5|, height of body 6| 

 in the total length. Eyes diameter 7 to 8 in the length of head, 

 2 diameters from the end of snout, and 3 to 3| apart. Head 

 one fourth wider than high, its width equal to its length excluding 

 the snout. Upper jaw the longer, the width of the gape of the 

 mouth four elevenths of the length of the head. Most of the 

 occiput and the whole of the occipital process granulated. Median 

 longitudinal groove on the head narrow, rather deep, and reaching 

 nearly to the base of the occipital process, which is keeled, very 

 slightly longer than wide at its base and extending to a narrow V-- 

 shaped basal bone. Opercle higher than wide. Barbels the maxil- 

 lary not quite so long as the head, the outer mandibular reach the 

 gill-opening. Teeth those on the palate with globular heads, in large 

 semi-ovate patches : considerable variation in size and direction of 

 these patches of teeth exists, as it not unfrequently happens that 

 some are wanting. Fins dorsal rather higher than the body, the 

 spine of moderate strength, anteriorly serrated in its upper, rough 

 in its lower half, posteriorly serrated^ it is as long as the postorbital 

 portion of the head ; length of the base of the adipose dorsal two 

 thirds of that of the rayed fin. Pectoral reaching two thirds of the 

 distance to the ventral ; pectoral spine rather stronger than the 

 dorsal, which it equals in length, externally it is serrated, internally 

 denticulated. The ventral does not extend so far as the anal. 



