74 Proceedings of the Zoological Society. 



Phractocephalus, Agassiz. Pirarara of Spix . 



Phract. Kuturnee, Sykes. A Phractocephalus, with 6 cirri, 2 of 

 which only are longer than the head ; the first pectoral spine 

 serrated on both edges ; the 1st dorsal spine on the posterior 

 edge only ; these two spines terminating in a filament : the 

 shoulder-bone elongated into a point behind. Greatest length. 

 (5 inches ; dorsal fin of 7 rays ; pectoral of 9 rays ; ventral fin 

 small, of 7 rays ; second dorsal replaced by a small adipose fin. 



Phract. Itchkeea, Sykes. A Phractocephalus, with 8 cirri, 2 of 

 which from the upper Up, extend to the end of the pectoral fins ; 

 the other 2 very minute, with the 4 on the chin nearly as long 

 as the head ; with the 1st ray in the pectoral fins only serrated ; 

 with 8 rays in the dorsal, and 12 in the anal fins ; with a sharp 

 prolongation of the scapula. Fish handsomely marked on the 

 back with dark colours. Length, 2 inches. 



This fish presents some slight deviations from the generic characters. 



Phract. Gogra, Sykes. A Phractocephalus, with 4 shortish cirri ; 

 the plates of the shoulder elongated into acute, angular, broad 

 spines, with a dorsal fin of 8 rays ; first ray a bone serrated be- 

 hind ; pectoral fins of 10 rays, the first ray a broad compressed 

 bone serrated on both edges ; head flat and broad ; second dor- 

 sal small, fleshy. Size 6 inches, but grows larger. 



Pimelodus, Lacepede. 



Pimelodus Seengtee, Sykes. A Pimelodus, with the caudal fin divided 

 into 2 unequal sharpish lobes, and having 8 cirri, 2 of which 

 reach to the tail fin, and 4 to the end of the head, and 2 are shor- 

 ter than the head ; the dorsal fin high and without spine, of 9 

 rays ; 12 rays in the anal fin ; the second dorsal adipose, and ex- 

 tending from the termination of the first dorsal to near the tail. 

 Length of fish, 6 inches. 



Ageneiosus, Lacepede. 



Ageneiosus Childreni, Sykes. An Ageneiosus, without cirri, with the first 

 ray of the dorsal and pectoral fins serrated on the anterior edge 

 only ; with 8 rays in the dorsal, and 42 in the anal fin ; with 

 two sharp lobes to the tail, the upper being somewhat the small- 

 est. Length of fish, 18 inches ; height, 4| inches, but grows to 

 a larger size. Second dorsal adipose, minute, 



Fam. Clupeidee. 



Mystus, Buchanan Hamilton; Notopterus, Lacepede. 



