SILURIDZ. 9t 
I have restored the name of catus* to this species, following in this 
respect Valenciennes and the older American authors rather than 
Girard, who transferred the name to an entirely different species. The 
fact that Linnzeus counted twenty anal rays renders it unlikely that he 
had a specimen of lividus, a species with twenty-five anal rays before 
him. As itis not possible to say with certainty what species he did 
have, we must adopt Valenciennes’s identification of it untilitis shown 
that it is probably erroneous. The following is Linneus’s description 
(Systema Naturze, xii, 504) :— 
Catus 12. S. pinna dorsali postica adiposa, ani radiis 20. Cirris 8. B. 5, D4, 0. P 7: 
V. 8, A. 20. C. 17. 
Catesb. car, 2. p. 23. t. 23. Bagre 2. Marcgr. affinis. 
Marcgr. bras. 173. Bagre species, 2. 
Habitat in America, Asia, 
Ex—Asia vidi pinnis veutr. radiis 6. 
The species termed atrarius, nebulosus, and catus by the earlier authors 
are evidently identical. 
There is nothing in the long description of Pimelodus felis to indicate 
that it is distinct from the common Lake Bullhead. In the elaborate 
enumeration of characters, individual and generic, given by Prof. 
Agassiz, nearly all that is specific seems to be lost. 
On examination of the type-specimens of Pimelodus hoyi Grd., and 
P. vulpeculus, Girard, I am unable to see that they differ at all from this 
species. The caudal fin is not more emarginate than is usual in catus. 
Amiurus mispiiliensis Cope appears to differ in some respects ; but 
these are probably individual peculiarities, as but one specimen seems 
to be known. 
The best figure of this species is that given by Dr. Storer under the 
name of Pimelodus atrarius. 
*In the twelfth edition of the Systema Naturz (p. 503), Linnzeus describes a 
Silurus felis, which has been considered a species of Amiurus. An examination of 
Linneus’s description has satisfied Prof. Gill and myself that S. felis was most prob- 
ably based on Arius milberti C. & V. This latter species should then stand as Ariopsis 
felis (L.) Gill & Jordan. ; 
The following is the original description : 
Felis. 10. S. pinna dorsali postica adiposa, ani radis 23 cirris 6, cauda bifida. B.5, D4, 0. P. 4 
Veo wArOS Cras 
Habitat in Carolina. D. Garden. 
Cirri sub labio inferiore 4, supra sinus oris utrinque 1. Dorsum cerulescens. P. ventrales ana- 
lisque rubescentes. Cauda bifida. A finis S. Cato. 
