260 CALIFORNIA ACADEMY OF SCIENCES. 



near Cincinnati, Ohio, the alimentary canal was wound 

 around the air-bladder more than a dozen times, though the 

 ovaries were not thus inclosed. 



4. Leuciscus purpureus Girard. 



One specimen 1% inches long from Morse Canon, and 

 three of the same length from the Yaqui River, east of 

 Oposura, are identified provisionally but very doubtfully 

 with this species. The one from Morse Canon has the 

 head 3^, depth 3^3 in length, eye 3^ in head, longer 

 than snout. Dorsal 9, anal 7, lat. 1. 53. Teeth 1,4-5, 1. 

 The three from the Yaqui have the following descrip- 

 tion: 



Head 3^ in length, eye 2% * n head, a little longer 

 than snout. Dorsal 9, anal 7, lat. 1. 70, complete. Teeth 

 4—4, hooked, with flat or slightly grooved grinding sur- 

 face. Maxillary about to vertical from anterior margin 

 of eye, slipping under the preorbital, without barbel. 

 Mouth oblique, head pointed, lower jaw included. Dor- 

 sal inserted over ventrals; anal deep, pointed. Olive 

 above, silvery below, sides and back finely dusted with 

 black. Lateral band, caudal spot, and a median dorsal 

 line, black. 



5. Agosia chrysogaster Girard. 



Numerous specimens from Rucker Canon, the largest 

 about three inches long, and one small specimen from 

 Morse Canon; also three specimens 1% inches long from 

 Hermosillo. 



Dorsal 8, anal 7. Head 3^ to 4, depth 3^ to 4 in 

 length; eye 3^ to 4 in head, longer than snout in the 

 smaller specimens. Mouth low, terminal, scarcely ob- 

 lique, the lower jaw included; premaxillaries protractile; 

 maxillary to below nostril in the larger specimens, with 

 barbel at extremity. Teeth 4-4, hooked, with deeply 



