Series Ostariophysi 175 
priscus 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, Tinca, Rhodeus, Aspius, and 
Gobio are found in regions now inhabited 
by these genera, and many species are 
referred to the great genus Leuciscus, Leu- 
ciscus eningensts 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 Leuctscus turnert. 
Fossil Catostomide are very few and 
chiefly referred to the genus Amyzon, \y 
supposed to be allied to Erimyzon, but george were ca ts 
with a longer dorsal. Amyzon commune er, Catostomus macro- 
and other species are found in the Rocky — “*et!s- 
Mountains, especially in the Miocene of the South Park in Colo- 
rado and the Eocene of Wyoming. Two or three species of 
Fie. 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 Cobitide, 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 
