310 SMITHSONIAN MISCELLANEOUS COLLECTIONS [vo. 48 
suspect any great internal differences or that they were very distinct 
from minnows or chubs. The mouth and mouth parts are normal. 
TUNA a asta ates AYYYYYYY NIKKEI) Twn; 2 
RY NWHA RAED ERAN RRP RRERN RARER NOT 
DESCENDS ARORNE ASD NASON 
a 
PVR RRND 
RRO dasa 
Fic. 56.—Campostoma anomalum, showing the air-bladder (in outline) involved 
in the circumvolutions of the alimentary canal. After Cope. ' 
Dissection, nevertheless, reveals a strange and otherwise unexampled 
condition of the viscera. 
The intestinal canal is extremely elongated and it goes out of its 
regular course to involve the air-bladder and surround it with many 
coils, and within these coils are 
also involved even the gonads 
(ovaries of the females and 
spermaries of the males). This 
arrangement contrasts strongly 
with that manifest in other 
Cyprinids: and, in’ fact, aa “all 
other teleost fishes, in which the 
air-bladder (when present) is 
next to the roof of the abdominal cavity. 
The only genus, Campostoma, according to Jordan and Evermann, 
has four species, fishes of moderate size as American Cyprinids go 
Fic. 57.—Teeth of Campostoma 
anomalum. After Agassiz. 
Fic. 58.—Campostoma anomalum. After Jordan and Evermann. 
