ON WEST MEXICAN LAND AND FRESH WATER 

 MOLLUSCA. 



BY J. G. COOPER. 



BuLiMULUS EMEUS Say var. membranaceus Martens. 



Three specimens, only one full grown, seem to be of 

 this species. They are very thin, translucent, the thick- 

 est pale yellowish, an inch long, whorls 5. They are 

 from the vicinity of Tepic. 



Oleacina turris and var. albersi Pfeiffer (Glan- 

 dina turrita Carpenter). 



This was credited to California by Pfeiffer, but has 

 not even been found on the peninsula. The eight fresh 

 specimens brought from Mazatlan are intermediate be- 

 tween the two forms figured by Binney, and are from 

 I to 13^ inch long, more like the typical turris than the 

 var. alhersi, which was the form from " California." Xan- 

 tus found it at Colima in the Sierra Madre. 



Orthalicus princeps Broderip. 



But two of this genus were brought, which come nearest 

 to this subspecies of the old species undatus Bruguiere, 

 which they closely resemble. They are from Tepic, but 

 some form of it inhabits all of Mexico and tropical Amer- 

 ica, the West Indies and Florida. 



CoNULUS FULvus Miiller. 



One specimen is exactly like the large west coast form 

 of this species found in California. 



Hyalinia indentata Say. 



Fourteen fresh shells from the Tepic Valley are larger 

 than those from Lower California and darker than usual, 

 otherwise similar to eastern shells. 



2d See., Vol. V. June 8, 1895. 



