Fossil Freshwater Mollusks from Oregon 



body whorl in a direction almost at right angles to the diameter of 

 the shell while in P. parvus the line is only about 30 degrees from 

 the horizontal. This makes the depth of the aperture in proportion 

 to its breadth much greater in P. scdbiosus. Diameter, 3.4 mm.; 

 altitude, 1.1 mm. 



Type, No. 15 University of Oregon. Cast of same, No. 678, 

 Mus. California Acad. Sci. 



Type from University of Oregon locality 212. Warner Lake 

 beds, eastern Oregon. Pliocene. 



In the shape of the whorls this little species differs from all 

 other species of the small planorbs known to me. The sculpture 

 consists only of fine regular growth lines but this is somewhat ob- 

 scured by limy incrustations which suggested the name. The species 

 is not rare at the type locaity, about a dozen specimens having been 

 found. 



GENUS: PARAPHOLYX HANNA, NEW NAME 



Pompholyx Lea, Proc. Acad. Nat. Sci. Phila., Vol. 8, p. 80, 1856. Type, 

 Pompholyx effma new species. Lea, Journ. Acad. Nat. Sei., Vol. 6, p. 156, pi. 

 23, fig. 69, 1866 Dall, Proc. Calif. Acad. Sci., Vol. 3, p. 265, 1866. (Describes 

 new subfamily, Pompholinae, possibly new family, Pompholidae. Figures and 

 description of external anatomy of soft parts.) Binney, Land & Fr. Water 

 Sh. 2, Smith, Misc. Coll. 143, pp. 73-4, fig. 119, 1865. (Two views of type 

 specimen.) Dall, Ann. N. Y. Lye. Nat. Hist., Vol. pp. 333-340, 1870. (Uses 

 name Pompholiginae for subfamily including Pompholyx, Carinifex and 

 Choanomphalus (?). Not Pompholiginae Dall, Proc. U. S. Nat. Mus., Vol 23, 

 p. 814, 1901, a section of the marine genus, Divaricella.) Hannibal, Proc. Mai. 

 Soc. Lond., Vol. 10, p. 162, 1912. Walker, Univ. Mich. Misc.. Pub. 6, p. 14, 

 105, 1018. Not Pompholyx, Gosse, Ann. Nat. Hist., Vol. 8, p. 203, 1851, a 

 genus of Eotifera. 



When Lea established the genus Pompholyx for the West 

 American fresh-water shell he evidently was unaware that the 

 same name had been previously used for a genus of rotifers. A 

 search of available literature fails to disclose any other name that 

 has been substituted for the mollusk ; therefore the new name Para- 

 pholyx is proposed with the same type species, Pompholyx efiusa 

 Lea. Pompholopsis Call (Type, P. whitei Call)' was proposed as 

 a subgenus of Pompholyx to contain a species found in the Tassa- 

 jara Lake Beds, California. While it doubtless belongs to the same 

 family as Parapholyx it is not believed to be congeneric and is 

 therefore not available to replace the preoccupied name. Call 

 states that the specimens of Pompholopsis whitei were deposited in 

 the collection of the University of California at Berkeley but a 

 search conducted therefor by Professor Bruce Clark has been with- 

 out success. 



Call, R. E. Am. Geol., Vol. 1, p. 146, vgs. 1-3. 1888. 



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