SUDIS. 197 



Among the drawings in the Schomburgk Col- 

 lection there are no representations of any species 

 belonging to the Clupece or Herrings^ with the ex- 

 ception of two rare and remarkable fishes, which, 

 though placed there by some ichthyologists, have 

 been so often removed, and have received so many 

 stations, that in the absence of specimens we prefer 

 noticing them separately, rather than allotting to 

 them, any place upon comparatively imperfect infor- 

 mation. The first will be typical of the genus 



SUDIS, Cuv. 



This genus of Cuvier is framed from two or three 

 large fishes, natives of the rivers in Brazil and 

 Guiana, and of the Nile in Africa ; and by him it 

 is placed near the end of the Herrings, after Ery- 

 thrinus^ to which he considers it also allied. By 

 Agassiz it is placed at the commencement of his 

 Clupeoidei^ and in the Brazilian Fishes a detailed 

 description of the skeleton is given. In the later 

 " Classification of Fishes" by Mr. Swainson, again, 

 its station is made to be between Salmo and Cypri- 

 nus, or as the connecting link between the carps 

 and the salmon ; at the same time, he restricts tlie 

 genus to the species of America, giving to those of 

 Africa the generic title of Clupesudis. In the latter 

 arrangement he will, we believe, be found to be 

 correct, from a difference in structure of the bran- 

 chise. The following are the characters given in 

 the Brazilian Fishes : — 



