316 SILURID.E. 



anal with 9-11 brancbed rays; second or 



first and second soft dorsal rays longest, 



not longer than head 4. (\ furcatiis, Gthr., i). 320. 



Snont obtusely pointed, not much broader than 



long ; width o£ mouth 2^ to 4 times in 



length of head ; anal with 7-9 branched 



rays; second (rarely first) soft dorsal ray [[>. 321. 



longest, usually at least as long as head . 5. C. Hi(/rodii/itat(is, Lace})., 

 Snout rounded, broader than long ; width of 



mouth 2 to 2| times in length of head ; 



anal with 7-8 branched rays ; first or first 



and second soft dorsal rays longest, usually 



shorter than head 6. C. loalkeri, Gthr., p. 324. 



B. Base of adi[)0se fin as long as or longer than that of rayed dorsal^ Irom 

 which it is separated by a space equal to li times its length ; anal with 

 6-8 branched rays ; first soft dorsal ray longest ; 10-12 gill-rakers on 

 lower part of anterior arch. 

 First soft dorsal ray more or less produced ; 

 longest rays of caudal 2| to 3 times length 



of median 7. C anrcdus, Geoffr., p. 325. 



First soft dorsal ray not produced ; longest rays 



of caudal twice length of median . . . 8. C rueppelU, Blgr., p. 327. 



III. Dorsal 1), to 1| times as distant from root of caudal as from end of snout ; 

 band of prremaxillary teeth feebly curved, 4 to G times as long as broad : 

 lenoth of head 3?, to 3| times in total length ; maxillary barbel longei- tiian 

 head ; nasal barbel not half diameter of eye ; width of mouth 2 to 3 times 

 in length of head ; 17-23 gill-rakers on lower part of anterior arch ; anal 

 with 8-9 branched rays ; longest rays of caudal 3 to 3 5 times length of 

 median. 



Maxillary barbel a little longer than head . . 9. C. hreviharhis, Blgr., jn 329. 

 Maxillary barbel at least 3 times length of 



lieud 1*-^' ^ '• loii(jiha)in!<, Blgr., p. ?)'M). 



IV. Dorsal not more than l.\ times as distant from root of caudal as from end 

 of snout ; band of j)r;ieuiaxillary teeth curved, 4 to 8 times as long as Itroad; 

 length of head 3 to 3^ times in total length ; maxillary barbel not or but 

 slightly longer than head ; nasal barbel ?; to 2 diameters of eye ; width of 

 mouth l-j to 2 times in length of head. 



A. Base of adipose fin nearly as long as its distance from the rayed dorsal ; 

 anal with 7-9 branched rays. 

 Head 1^ times as long as broad ; first soft 



dorsal ray longest 11. T. r/^///o///, Blgr., p. 331. 



Head not or but little longer than liroad; second 



and third soft dorsal ravs longest . . . 12, C. icio/ejuutri, Blgr.,, ]i. 331. 



