29. SILURIDyE NOTURUS. 90 



5 in this distance; dorsal nearer anal than snout. Anal 11. numeral 

 jirocess very she rt. L. 3 inches. Georgia to Mississippi ; not abundant. 



(Jonlau, Ann. Lye. Nat. Hist. N. Y. 1877; Jordan, 1. c. 102.) 

 ft I'ectoral spine serrate behind, ronghish in front; adipose fin emarginate. 



hb. reetoral spines extremely strong, more than half the length of head, curved ; 

 their posterior serraj strong, spine-like, hooked backward, each about as 

 long as the diameter of the spines. 



86. IV. matirHS Jordan. 



Body much mottled, black and grayish. Top of head, tip of dorsal, 

 middle of adipose fin, and edge of caudal definitely blackish. Body with 

 four broad cross-blotches, one before dorsal, one behind it, one on mid- 

 dle of adipose fin, and one small one behind it. Adipose fin connected 

 with the caudal fin. Distance from snout to dorsal about 2|j in length. 

 I^ectoral spine 2J in this distance. Dorsal fin higher than long. Body 

 not very elongate nor much depressed. Dorsal region often somewhat 

 elevated. Depth usually 4^-5 in length; head 3^-4. Dorsal nearer 

 anal than tip of snout. Anal 12 or 13 rays. Pectoral spine curved and 

 finely i;errate without, with six strong recurved i)ectinatious within, 

 each neiirly as long as the diameter of the spine. Humeral process 

 short. L. 4 inches. Great Lakes to Minnesota and Louisiana ; com- 

 mon. 



(Jordan, Ann. Lye. Nat. Hist. N. Y. 1877, 371 ; Jordan, 1. c. 100.) 



87. N. caecatlierMS Jordan. 



Color much as in N'. mhims, extensively variegated. Snout, cheeks, 

 and occipital region black. A black bar across front of dorsal, one be- 

 hind dorsal, and another across middle of adipose fin ; base of caudal 

 fin black. One or two narrow horizontal black bars across dorsal and 

 anal near their tips. Caudal vaguely barred, largely black, its tip 

 white. Body stout, broad forward, tapering behind. Head large, flat- 

 fish, 3.^ in length of body, without caudal ; depth of body 5^ in length ; 

 width of head 4^ in length of body. Mouth large, the upper jaw much 

 ])rojecting; barbels rather long. Adipose fin rather high, so deeply 

 notched that the continuity of the fin is broken for a distance nearly 

 equal to the diameter of the eye. A keel on the back in front of the 

 adii)ose fin. Caudal fin rounded. Distance from snout to dorsal 2c| in 

 length of body. Pectoral spine in this distance 2 times ; in head lA. 

 Dorsal spine one-half the height of the fin •, 3^ times in distance from 

 snout to dorsal; 2.;^ in length of head. Pectinations of pectoral spine 

 very strong, recurved, nearly as long as the diameter of the spine. 

 Front of pectoral spine with sn'.all teeth turned I'orward. Fin-radii : D. 



