CLAEIAS. 225 



Length of head 4-4| times in total ; maxillary 

 barbel 2-2| length of head ; 17-22 gill- 

 rakers on anterior arch; D. 78-87, A. 55-67. 21. C. bytldpogon, Sauv., p. 252. 

 Length of head 4-4^ times in total ; maxillary 

 barbel lj-l§ length of head; 14-15 gill- 

 rakers on anterior arch ; D. 65-78, A. 55- 

 62 ; occipital process much loDger than 



broad 22. C. alluaudi, Blgr., p. 253. 



Length of head 4^-5 times in total; maxillary 

 barbel 11-2 length of head ; 16-18 gill- 



rakers on anterior arch; D. 82-91, A. 68-72. 23. C. werneri, Blgr., p. 254. 

 b. Vomerine teeth granular, in a fan- 

 shaped patch ; length of head 4 

 times in total ; maxillary barbel 

 1^ length of head; 16 gill- 

 rakers on anterior arch ; D. 80, 



A. 63 24. C. macromy state-, Gthr., p. 256. 



2. Nasal barbel shorter than head. 



a. Length of head 3-|— 4| times in total ; distance between occipital 



process and dorsal |-| length of head ; D. 60-72, A. 44-55. 

 Pectoral spine strongly serrated on both sides ; 



12-15 gill-rakers on anterior arch . . . 25. C. dumerilii, Stdr., p. 257. 

 Pectoral spine feebly serrated ; 20 gill-rakers 



on anterior arch 26. C. libeviensis, Stdr., p. 258. 



b. Length of head 4|-5| times in total; A. 68-80; 15-20 gill-rakers 



on anterior arch. 

 Head 1?— 1£ as long as broad ; nasal barbel 



f-f length of head ; D. 92-95 . . . . 27. C. pachynema, Blgr., p. 259. 

 Head 1£-1£ as long as broad ; nasal barbel 



i-f length of head ; D. 79-87 . . . . 28. C. heviceps, Gill, p. 260. 



C. Dorsal and anal embracing or adnate to base of caudal ; maxillary barbel 



f-l.i length of head. 

 1. Head 1+-1J times as long as broad. 

 Length of head 4 times in total ; ventrals a 

 little nearer end of snout than caudal ; 



D. 55, A. 50; pectoral spine not serrated 



on outer side 29. C. buettikoferi, Stdr., p. 261. 



Length of head 5 times in total ; distance 

 between ventrals and caudal 1\ that be- 

 tween ventrals and end of snout ; D. 80, 

 A. 65 ; 15 gill-rakers on anterior arch; 

 pectoral spine serrated on both sides . . 30. C. amplemcauda, Blgr., p. 261. 



VOL. II. o 



