45 



Key to the i nd o-aust ral ia n genera of 

 Abramidinae. 



A. Ventrals always present. 



I. A pair of long maxillary barbels present. . . . Nematabramls p. 45. 

 II. No barbels. 



A. A trenchant edge from throat to anus. 



1. Nuchal scales beginning far behind eyes; 

 lateral line may be abruptely bent down- 

 wards above pectorals Laubuca p. 47. 



2. Nuchal scales beginning above eyes; la- 

 teral line gently curved. 



a. Pectorals situated above the ventral 

 profile, which is convex in its whole 



length Chela p. 50. 



b. Pectorals situated in the ventral profile, 

 which is convex only in its praepec- 



toral part Macrochirichthys p. 53. 



B. A trenchant edge between base ofventrals 



and anus only Rasborichthys p. 55. 



B. No ventrals Parachela p. 57. 



I. Nematabramis Boulenger. 



(BOULENGER Ann. Mag. Nat. Hist. (6) XIII. 1894, p. 249). 

 Mearnsella Scale & Bean, Proc. U. S. Nat. Mus. XXXIII. 1908, p. 231. 

 Nematabramls L. S. Berg, Annuaire du Mus. Zool. St. Petersbourg XIV. 1909, p. 43. 



Oblong, much compressed, with a trenchant ventral edge. 

 Upper profile slowly ascending from snout to dorsal, somewhat 

 convex, slightly concave on head and nape. Gape of mouth 



Fig. 20. Nematabramis stcindachncri Popta. about X! 5 /i- 



moderately large, obliquely directed upwards; lower jaw slightly 

 longer than the upper one, which is protractile. A more or less 

 developed symphysial knob, fitting in a corresponding shallow 



