BY W. MACLEAY, F.L.S. 253 



elevated, its longest anterior rays being as long as the head ; it 

 commences in front of the anal. Upper pectoral rays blackish, 

 lower whitish ; dorsal fin entirely black. 



Cape York. Length five inches. 



Family VIII. CYPKINIDJE. 



Body generally covered with scales, head naked. Margin of 

 the upper jaw formed by the intermaxillaries. Belly rounded, 

 or if trenchant, without ossicles. No adipose fin. Stomach 

 without blind sac. Pyloric appendages none. Mouth toothless ; 

 lower pharyngeal bones well developed, falciform, subparallel to 

 the branchial arches, provided with teeth, which are arranged in 

 one, two or three series. Air-bladder large, divided into an 

 anterior and posterior portion by a constriction, or into a right 

 and left portion, enclosed in an osseous capsule. Ovarian sacs 

 closed. 



Fresh waters of the World. 



Genus Neocarassius, Casteln. 



Scales large. Belly compressed into a sharp ridge behind the 

 ventrals, the scales of one side not overlapping on the other. 

 Dorsal fin short, with a strong serrated ray, behind the ventral ; 

 anal fin short. Cleft of the mouth lateral. Barbels none. Allied 

 to Rohteiclitlajs. 



Australia. 



881. Neocarassius ventricosus, Casteln. 



Proc. Zool. Soc, Victoria, Vol. I., p. 237. 



D. 21. A. 8. V. 8. P. 19. L. lat. 30. L. transv. 7/8. 



Body very high and thick, with the belly very round and 



prominent ; the height is twice and a third in the total length ; 



the length of tho head four times and a half ; the diameter of the 



orbit four-tenths of the length of the head. Large scales on the 



