Series Ostariophysi 



'75 



prisons occurs in the Miocene of Germany, perhaps showing that 

 Germany was the original home of the so-called "German carp," 

 afterwards actually imported to Germany 

 from China. Some specimens referred to 

 Barbus, Tinea, Rhodeus, Aspius, and 

 Gobio are found in regions now inhabited 

 by these genera, and many species are 

 referred to the great genus Leuc-iscus, Leu- 

 ciscus ceningensis from the Miocene of 

 Germany being perhaps the best known. 

 Several species of Leuciscus or related 

 genera are found in the Rocky Mountain 

 region. Among these is the recently de- 

 scribed Leuciscus turneri. 



Fossil Catostomidce are very few and 

 chiefly referred to the genus Amyzon, 

 supposed to be allied to Erimyzon, but 

 with a longer dorsal. Amyzon commune 

 and other species are found in the Rocky 

 Mountains, especially in the Miocene of the South Park in Colo- 

 rado and the Eocene of Wyoming. Two or three species of 



FIG. 139. Pharyngeal 

 teeth of Oregon Suck- 

 er, Catostomus macro- 

 cheilus. 



FIG. 140. Razor-back Sucker, Xyrauchen cypho (Lockington). Green River, 



Utah. 



Catostomus, known by their skulls, are found in the Pliocene 

 of Idaho. 



The Loaches. The Cobitidcs, or loaches, are small fishes, all 

 less than a foot in length, inhabiting streams and ponds of 

 Europe and Asia. In structure they are not very different from 

 minnows, but they are rather eel-like in form, and the numerous 



