PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 575 



basses et si envelopp^es dans une peau epaisse, qu'on ne pent reconnoi- 

 tre leur presence que par la dissection." 



Two species are mentioned, Gymnomurwna doliata La C. {=Ecliidna 

 zebra (Shaw) Bleeker) and Gymnomur(jena marmorata {=Murcenoble7ina 

 marmorata), both of whicli agree fairly with the generic definition. 



The first restriction of the genus Gymnomurcena is that of Kaup (Apo- 

 des, 1856, 103), in which zebra (doliata) is regarded as the type ; and 

 the group is recognized (probably correctly) as distinct from Echidna 

 Forster {=Poecilo])Ms, Kaup). 



Later Dr. Giinther (Cat. Fish, Brit. Mus., viii, 133, 1870) has restricted 

 the name Gymnomurwna to the second species of La Cepede [marmorata). 

 This arrangement seems to us not allowable. The first proper restric- 

 tion must hold, and the name Gymuoniurcena henceforth go with G. do- 

 liata. 



13. MUE^NOBLENXA. 



The group called by Dr. Giinther Gymnomurcena should stand as Mu- 

 rcenoblenna La Cepede (Hist. Nat. Poiss., v. 652, 1803). This genus is 

 based on a single species, M. olivacea La C, and is defined as follows : 



" Point de nageoires pectorales ; point d'apparence d'autres nageoires ; 

 le corps et la queue presque cylindriques 5 la surface de I'animal repan- 

 dant en tres grande abandance, une humeur* laiteuse et gluante." 



14. MACEORHAMPHOSUS. 



The genus MacrorhampJiosus La Cepede (v. 136) is based on Silurus 

 eornutus ¥oTskM= Centriscus scolopaxh. In the tenth edition of the 

 Systema Naturae, Linnseus refers to his genus Centriscus but one spe- 

 cies, G. scutatus. This species should, therefore, properly be taken as 

 the type of Centriscus {=Amp1iisile Cuv.), while the name Macrorham- 

 phosus should be used for G. scolopax and its relatives, the group usually 

 called Centriscus. 



The following is a summary of the changes in nomenclature suggested 

 in the present paper : 



HiATULALa Cepede for Tautoga Mitchill. 

 GoBiOMORUs La Cepede for Fliilypnus Cuv. & Val. 

 Cyphosus La C6pede for Pimelepterus La C6pede. 

 MoNODACTYLUsLa Cepede for Psettus Cuv. & Yal. 

 ScoMBEROMORUsLa Cepede for Cybium Cuv. & Val. 

 Cephalacanthus La Cepede for Dactylopterus La C6pMe. 

 Sci^NA (Bairdiella) chrysura (La Cep.) Jor. & Gilb. for 

 Scicena {Bairdiella) argyroleuca (Mitchill), J. & G. 

 Ch^todipterus La Cepede for ParepMppus Gill. 

 PoMADASYsLa Cepede for Pristipoma Cuv. & Val. 



*Heuce the name; " Blenna, en grec, signifie mueosite." (La Cepede.) 



