122 ^J^SE SALMONIDJE AND THYMALLIDM—GtLL. vol xvii. 



Genus T H YM A L LUS. 



< Lvs Omhr.es (Coreijonus), Cuviek, Regue Animal, v. 2, p. 162, 1817. 



— Les Ombres {Thymallus), Cuviek, Regue Animal, 2. etl., v. 2, p. 306, 1829. . 



= Thijmallm, Nilsson, Prodr. Icb. Scaud., p. 12, 1832. 



= Aesche, Choregon, Minding, Lebrb. Natnrgescli. Fische. p. 119, 1832. 



The history of Tliymallun is somewhat complicated with that of 

 Goregonus. 



Ill 1816, Guvier gave the name "Les Ombres (Ooregoims. Art.)" to a 

 group composed of the graylings and whitefishes. 



In 1829, Guvier divided the " Ombres " into two geuera (or subgenera), 

 naming the ''Ombres" or graylings, Tliymallus^ and the whitefishes 

 Coregonus. 



In 1832, Minding gave the name "Aesche, Choregon,''^ * to a genus of 

 which the only species mentioned was the " Thymus-Aesclie, G. Thy- 

 mallus.^^ The name was evidently given as a substitute for Goregonus 

 of Artedi and Guvier (1817). 



Inasmuch as Guvier, Fleming, and others simply adopted Goregonus 

 from Artedi and Linnicus, I do not think that the fact that they 

 brought into such prominence the Thymallus is sufficient to insure the 

 acceptance of that species as the type of Goregonus. 



Thymallus was preceded by Thymalus, a Coleopterous genus named 

 by Latreille in 1802. Those who think that the two conflict may take 

 the name Ghoregon in x)lace of Thymallus. t 



* (v. Xocr/ytu, ich fiihre den Chor an.) 



tThe name Choregon is distinct etymologically and ' in form from Coregonus. 

 Artedi, the author of the name, in his Philosophia lehthyologica (p. 72), gave the 

 following etymology: 



"Coregonus « Kup?] ])upilht ovuli & y<ji'i(i argulus quia pupilhi auteriore parte in 

 anguliun acutum procurrit." 



