250 PROCEEDINGS OF THE ACADEMY OP 



2. Pollachius carbonarius Bon. 



3. " typus Bon. 



4. Gadus morrhua L. 



5. Melanogrammus seglifmus Gill. 



6. Brachygadus luscus Gill. 



7. " minutus Gill. 



8. Merlucius vulgaris Flem. 



9. Molva vulgaris Flem. 



10. Lota vulgaris Cuv. 



11. Onos mustela Gill. 



Klein, in his fifth and last "Missus," (1749,) substituted the name Calla- 

 rias, and restricted the genus to species with three dorsal fins, the head tro- 

 'hiform, the tail coniform and girdled by the caudal. 



The species were distributed among two sections. 



Callakias, barbatus, cirro unico, pendulo e men to. 



1. Gadus morrhua L. 



2. Melanogrammus seglifinus Gill. 



3. Brachygadus luscus Gill. 

 4.*Gadus morrhua L. 



Callakias, imberbis. 



1. Pollachius typus Bon. 



2. " carbonarius Bon. 

 3.*Merlangus vulgaris Cuv. 



4. Trachurops macarellus Gill ex C. et V.f 



This genus is surprisingly natural and well defined, compared with most 

 of Klein's genera, and is co-equal with Giinther's Gadus or Cuvier's Morrhua 

 and Merlangus combined. The name cannot, however, be retained, as it is 

 a synonym of Gadus. 



Cuvier accepted the name Gadus in nearly its Artedian sense, distributed 

 the species among smaller groups, called by him subgenera, and did not ap- 

 ply the name itself to one of them, but conferring an independent one on 

 each called one of his subgenera Morrhua, characterizing it by the three 

 dorsals, two anals and a barbel at the chin. To it were referred the species 

 of Gadus, Brachygadus and Melanogrammus. 



Nilsson, in his " Prodromus Ichthyologiae Scandinavicse, " (1832,) modified 

 the subgenus Morrhua, including under it only Gadus and Brachygadus, 

 while Melanogrammus formed part of his Merlangus. He gave the following 

 diagnosis : 



" Corpus forma elegantiore ; pinnis dorsi tribus ; ani duabus & cirro men- 

 tali ; rostro extra maxillas procedente ; corpore maculis variegato ; cauda 

 subsequali." 



Bonaparte has adopted Nilsson's arrangement. 



Swainson, in 1839, proposed for the Cuvieran Morrhua? three genera, 

 Gadus, really equivalent to Morrhua ; Cephus for the Gadus macrocephalus of 

 Tilesius and Tilesia for the Gadus gracilis of the same author. These genera 

 are due to mistaken ideas, and the distinctions signalized do not exist. 



The reviewer has lately limited the genus as here adopted. 



Finally, Mr. Putnam, some time afterwards, being apparently unacquainted 

 with the different applications of the name by Nilsson, Bonaparte and the 



[Sept. 



