172 TELKOSTEI. PIIl'SOSTOMI. 



vomer and palatines in three patches on 

 either side joining anteriorly in the median 

 line. Dorsal spine nearly or quite as 

 long as the head 12. A. thalassinus, p. 181. 



B. Globular teeth on the palate. 

 A. 22. Head 4f in total. Eye 7 to 8 | in 



length of head. Maxillary barbels reach 



first third of pectoral spine. Teeth on 



palate in two oval patches placed far 



back. Dorsal spine as long as head be- 

 hind angle of mouth 13. A. buclianani, p. 181. 



A. 18-20. Head 4 to 5 in total. Eye 5 



to 6 in length of head. Maxillary barbels 



reach end of head. Teeth on palate in 



two semi-triangular patches, parallel 



along median line. Dorsal spine as long 



as head excluding snout 14. A.falcarius, p. 182. 



A. 20. Head 4 in total. Eye 6| in length 



of head. Gape of mouth two fifths of 



length of head. Maxillary barbels as long 



as head. Teeth on palate in two oval 



patches well forwards and slightly con- 

 vergent anteriorly. Dorsal spine as long 



as head behind angle of mouth 15. A. malabaricus, p. 183. 



A. 19. Head 4 in total. Eye 7 in length 



of head. Width of gape of mouth four 



sevenths of length of head. Maxillary 



barbels reach j ust beyondbase of pectoral. 



Teeth on palate in a pyriform band, 



placed well forward, slightly converging 



anteriorly. Dorsal spine as long as head 



excluding snout 16. A. pfatofawtu, p. 183. 



A. 19. Eyes small, in front half of head . 17. A. nella, p. 184. 

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



to 6 in length of head. Maxillary barbels 



reach middle of pectoral spine. Teeth 



on palate in a pyriform band, placed w T ell 



forwards, and widely divergent poste- 

 riorly. Dorsal spine as long as head [p. 184. 



ehind nostrils 18. A. macronotacanthus, 



A. 18. Head 4 to 4 in total. Eye 7 to 8 



in length of head. Maxillary barbels not 



quite so long as head. Teeth on palate 



in a large semi-ovate patch on either side. 



Dorsal spine as long as the post-orbital 



portion of the head 19. A. gayora, p. 18o. 



A. 18. ^ Head 4 in total length. Eye 4| 



to 5 in length of head. Maxillary barbels 



shorter than head. Teeth in a small 



ovate patch posteriorly on either side or 



else absent. Dorsal spine as long as head 



excluding snout 20. A. jatiut, p. 186. 



A. J 8. Head 3 in total. Eye 7 in length 



of head. Maxillary barbels as long as 



head. Teeth on palate absent (? two 



pear-shaped globular patches normally). 21. A. tcnuispinisj p. 187. 





