8 SILUKIDA'. 



Dorsal with 5-7 soft rays, anal with 20 or more. 



32. PSEUDOBAGRUS, p. 84. 



Dorsal with 7 soft rays, anal with less than 20 ; the t«eth of the dorsal spine are 

 • not dii-ected upwards ; no moveable labial teeth ; orbital margin not free. 



33. LiocAssis, p. 86. 



Dorsal with 7 soft rays, anal with less than 20 ; the teeth of the dorsal spine are 

 directed upwards ; no moveable labial teeth ; orbital margin not free. 



34. Bagroides, p. 90. 



The lower jaw with long, moveable teeth in front. 



35. Bagrichthys, p. 92. 

 ** Two mandihulary barbels. 



Teeth on the palate molar-like 36. Rita, p. 92. 



b. Palate toothless. Ventral rays six : East Indies. 



Caudal not emarginate 37. Acrochordoniciithys, p. 94. 



Caudal emarginate 38. Akysis, p. 96. 



39. Olyea, p. 97. 



Doubtful genera , 



[40. Braschiosteus, p. 98 



c. Palate toothless. Ventral rays eight or nine : North America. 



V. 8. Adipose fin of moderate length 41. Amiurus, p. 98. 



V. 9. Adipose fin short and thick 42. Hopladelus, p. 103. 



V. 9. Adipose flu low, long, subcontiguous or contiguous with the caudaL 



43. Noturus, p. 104. 



Group G. Fimelodiua. 



The anterior and posterior nostrils are remote from each other, none 

 being provided with a barbel. Tropical America (Africa). 



a. Teeth on palate preseiit. 



* Snout much prolonged, spatulate. 



The upper jaw is the longer ; eyes partly directed downwards. 



44. SoRUBiM, p. 105. 

 The upper jaw is the longer ; eyes lateral or directed upwards. 



45. Platystoma, p. 106. 



The lower jaw is the longer 46. Hemisorubim, p. 109. 



Upper jaw very long ; ventral below the last dorsal rays. 



47. Platystomaticiithys, p. 109. 

 ** Snout wot -prolonged. 



Adipose fin rayed 48. Phractocepiialus, p. 1 10. 



Adipose fin not rayed ; head granulated above. D. 1/6. 



49. Piramutana, p. 1 10. 

 Adipose fin not rayed ; head covered with skin above. D. 1/6. Barbels band- 

 like 50. Platynematiciithy.s, p. 111. 



Adipose fin not rayed; head covered with skin above. D. 1/6. Barbels fili- 

 form 61. Piratinga, p. 112. 



Dorsal with 10 or 11 soft rays 52. Sciades, p. 113. 



b. Palate toothless. 



* The gill-mcmhranes are separated from each other by a deep notch. 

 Dorsal with less than 9 soft rays; broad bands of villiform teeth in both jaws; 



barbels filiform or slightly compressed ... 53. Pimelodus, p. 114. 



