ADDENDA 29. SILURID.E ICTALURUS. 881 



Page 101. Instead of Pilodictis read: 



53.— L.EPTOPS Rafinesque. 



(Rafiuesque, Icbth. Oh. 18-20, ()4: type Pimelodus viscosus Ila,(.=Silurus oUvaris Raf. 

 Xenroi, small; cbip, eye.) * 



The species should stand as — 



91. I., olivaris (Kaf.) J. & G. 



'■'Pilodictis limosus^^ Eaf. was likewise based on a "drawing by Mr. 

 Audubon," which drawing, as shown by Eaflnesque's copy, is merely a 

 fancy sketch of an imaginary cat-fish. The name shouhl therefore be 

 disregarded. Of the remaining synonyms of this type, Leptops stands 

 next in date. 



On page 105, after Amiuriis catus, add: 

 98 (/'). A. brachyacantliiis 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 ; pectoral spine weakly 

 serrate behind only ; caudal not described. Head of ; depth 4|. D.I, 

 6; A. 22; P. I, 6. Medina Kiver, Texas. {Cope.) 

 (Cope, Bull. U. S. Nat. Mus. xx, 35, 1880.) 



On page 105, after Amiurus natalis, add: 

 lOO (&). A.bolli Cope. 



Olivaceous, belly and lower barbels pale. Body very slender. Head 

 Hat, one-fifth longer than wide; jaws subequal; base of anal as long as 

 head. Pectoral spine finely serrate ijosteriorly, 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 River, Texas. {Cope.) Perhaps a 

 variety of A. natalis. 



(Cope, Bull. U. S. Niit. Mus. xx, 35, 1880.) 



Page 106. The genus Ictalurus has been heretofore usually distin- 

 guished from Amiurus by the connection of the sui)raoccipital process 

 with tlie second interspinal. In all the species with truncate or rounded 

 caudal fin, there is a considerable interval between these bones. In the 

 Bull. Nat. Mus. No. 10 50 



