SILUJIID.E. 171 



A. U>. Head 3 in total. Eye 7 iu length 

 of head. Snout much produced. Max- 

 illary barbels reach hind edge of eye. 

 Teeth iu two obliquely ovate diverging 

 patches. Dorsal spine half as long as 



head 4. A. acutiroati'is, p. 17o. 



A. 18-19. Head 4 to 4 in total. Eye 

 5 in length of head. Maxillary barbels 

 reach eud of head. Palatine teeth in 

 two triangular patches diverging poste- 

 riorly. Dorsal spine not so long as head 5. A. sumatratuts, p. 17(3. 

 A. 18-19. Head 5 in total. Eye 4| in 

 length of head. Maxillary barbels reach 

 base of pectoral fin. Teeth on palate in 

 triangular patches as large as the eye, as 

 broad as long. Dorsal" spine as long as 



the "head behind the angle of the nijuth. 6. A. cenostts, p. 176. 

 A. 19. Head 4 in total. Eye of in length 

 of head. Maxillary barbels reanh the 

 end of the pectoral fin. Palatine teeth in 

 two pear-shaped patches, the small ends 

 forwards and converging, widely diverg- 

 ing posteriorly. Dorsal spine nearly as 



long as the head 7. A. parvininnis, p. 177. 



A. 17-20. Head 3^ to 4 in total. Eye 5 

 to 6 in length of head, and 2^ to 3 dia- 

 meters from end of snout. Maxillary 

 barbels do not quite reach the eye. Teeth 

 on the palate in a patch on either side 

 not longer than the eye, and wide asunder. 

 Dorsal spine rather above half as long 



as head 8. A. subrostratus, p. 178. 



A. 17-19. Head 4 to 4| in total. Eye 

 G to 7 in length of head. Head very 

 broad ; basal bone of dorsal fin large and 

 butterfly-shaped. Maxillary barbels reach 

 middle or end of pectoral spine. Teeth 

 in two confluent patches on either side 

 meeting anteriorly. Dorsal spine as long 



as the head excluding the snout 9. A. sagor, p. 178. 



A. 17. Head 4 in total. Eye 7 to 9 in 

 length of head. Maxillary barbels reach 



end of head. Palatine teeth on either 



side in a large triangular patch, emargi- 



nate posteriorly, and anteriorly conjoined 



by a small vomerine patch. Dorsal spine 



as long as head excluding snout 10. A. sona, p. 179. 



A. 16. Head 5| in total. Eye 4 in 



length of head. Maxillary barbels reach 



middle of pectoral fin. Teeth on vomer 



and palatines in three patches on either 



side converging in median line anteriorly. 



Dorsal spine as long as head behind 



middle of eyes 11. A. serratus, p. ISO. 



A. 15-17. Head 4\ to 5 in total. Eye 5 



in length of head. Maxillary barbels 



reach base of pectoral tin. Teeth on 



