ADDENDA 29. SILURID.E ICTALURUS. 
881 
Page 101. Instead of Pilodictis read: 
53.— L,EPTOPS Rafinesque. 
(Rafiuesque, Iclith. Oh. 1820, ()4; type PimeJodus viacosus Pn.(. = SilHrn8 olivaris Raf. 
XsTtroS, small; (bip, eye.) 
The species should stand as — 
91 . E. olivaris (Raf.) .J. & G. 
‘■‘■Pilodictis Umosus^^ Eaf. was likewise based on a “drawing by Mr. 
Audubon,” which drawing, as shown by Eafinesque’s coi)y, is merely a 
fancy sketch of an imaginary cat-fish. The name should therefore be 
disregarded. Of the remaining synonyms of this type, Leptops stands 
next in date. 
On page 105, after Aniiurus catus, add: 
98 (h). A. bracliyacantlitis Cope. 
Blackish, yellowish below. Body robust. Head not depressed ; eye 
small, 7 in head, 4 in interorbital width. Maxillary barbels reaching 
middle of pectoral spine; mental barbels to beyond the branchioste- 
gals; jaws equal. Dorsal and pectoral spines small, acute, not con- 
cealed in the skin, equal in length, less than the interorbital width, 
and not one-third distance from snout to dorsal ; ])ectoral spine weakly 
.serrate behind only ; caudal not described. Head 3|; depth 4|. D. I, 
G; A. 22; P. I, 6. Medina Eiver, Texas. {Cope,) 
(Cope, Bull. U. S. Nat. Mus. xx, 35, 1880.) 
On page 105, after Aminrits natalis, add: 
lOO (?q. A. bolli Cope. 
Olivaceous, belly and lower barbels pale. Body very slender. Head 
flat, one-fifth longer than wide; jaws subequal; base of anal as long as 
head. Pectoral spine finely serrate posteriorly, more than half length 
of head; dorsal spine long, smooth, a little shorter than pectoral, its 
base a little nearer muzzle than adipose fin; longest anal rays half 
liead ; caudal rounded, its upper rays longer than lower. Head 3| ; 
depth 5^. A. 25. Little Wichita Eiver, Texas. {Cope.) Perhaps a 
variety of A. natalis. 
(Cope, Bull. U. S. Nat. Mns. xx, 35, 1880.) 
Page lOG. The genus Ictalurus has been heretofore usually distin- 
guished from Amiurus by the connection of the supraoccipital jirocess 
with the second interspiual. In all the species with truncate or rounded 
caudal fin, there is a considerable interval between these bones. In the 
Bull. Nat. Mus. No. IG 5G 
