198 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



uaiiR' bi.sun on his aulhoiity. This species is not generally common ia 

 so far as my experience goes. I liuxc, however, seen one or two from 

 the Oiiio liiver. I found no specimi'iis in the National .Museum. 



47. CAKPIODES TUOMPSONI Agassiz. 



Lake Carp. 



184"^ — Catostomus cypriniis Thompson, Hist. Vf. 133. 



1S55 — Carpiodes thompsoni Agassiz, Am. Jouru. Sc. Arta, 2d series, xix, 191. 



Carpiodea thompaoni Cope, Proc. Ac. Nat. Sc. Pbila. 285, ldC4. 



Carpiodes thompnonn Copk, Proc. Am. Pbilos. Soc. Pbila. A>i'A, 1670. 



Carpiodea thoiin)8oni JoKDiUS', Man. Vert. 297, 1876. 



Jvhthyobus thompaoni Nelson, Bull. No. 1, Ills. Mus. Nat. Hist. 49, 1876. 



Carpiodea tJwmpsoni Jordan & Copkland, Cbeck List, 158, 1876. 



Carpiodea thompsoiiii Jordan &. Gilijkrt, in Klip|)art'8 Rept. 53, 1876. 



Carpiodea thompaoni Jordan, Man. Veit. ed. 2d, 322, 1878. 



Habitat. — Great Lake region ; abundant. 



This species occurs in more or less abundance throughout the Great 

 Lake region. It is the shortest and most arched of all the species. Its 

 dorsal fin is about intermediate between that of relifer and that of 

 caijyw. 1 have examined very many specimens of this species, and I 

 find little variation antong them. This fish reaches a length of somk'- 

 thing over a foot, and is sold by the Lake fishermeu as " Carp ". 



Specimena in United Stalea Xational Muacum. 



48. CAllPIODKS CVriilNUS {Lc Sueur) Aijr.ssiz. 



Eastern Carp SuvLer. XihrasLa Car}) Sucher. liio Grande Carp. 



1817 — Catoatomits ct/priniia Le Suruu, Journ. Ac. Nat. Sc. I'bila. i, 91. 



Labeo cyprinua DeKav, New York Fauna, part iv, Fisbos, 194, 1842. 

 Sclerognathua cyprinun Crvir.R «S: Valknciknnks, Hist. Nat. dea Poissons, xvii, 



474. 1844. 

 Sclerognathus cypr^nna Storkr, .Synopsis, 427, 1846. 

 Carpiodea cyprinua Aoas.^iz, Am. Journ. Sc. Arts, 2d series, xix, 191, 1855. 



