NO. 2193. WEST AMERICAN MARINE M0LLUSE8—BART8CII. 667 



specimen, having five postnuclear whorls, which measures — length, 

 3.6 mm. ; diameter, 2.1 mm. The other is an adult, having three and 

 one-fifth postnuclear whorls, and measures — length, 4.8 mm.; diam- 

 eter, 2.8 mm, 



I confused this species previously with Odostomia {Evalea) steph- 

 ensi Dall and Bartsch, which is a recent form, but additional material 

 of O. stephensi makes it necessary to change my opinion and requires 

 that this be described as new. 



ODOSTOMIA (EVAIiEA) ORFORDENSIS, new species. 



Plate 43, fig. 2. 



Shell small, oval. Nuclear whorls decollated. Postnuclear whorls 

 appressed at the summit, well rounded, marked by slightly retrac- 

 tively slanting, incremental lines and exceedingly fine spiral stria- 

 tions. Suture moderately constricted. Periphery of the last whorl 

 well rounded. Base moderately long, well rounded. Aperture oval ; 

 posterior angle acute; inner lip curved and appressed to the base; 

 parietal wall covered with a thick callus. 



The type. Cat. No. 252431, U.S.N.M., was collected by Harold 

 Hannibal in the upper Pliocene, Elk Kiver bed, at the mouth of Elk 

 River, at Port Orford, Oregon. It consists of the last three and one- 

 half postnuclear whorls and measures — length, 3 mm.; diameter, 

 1.6 mm. 



This form I had previously identified as Odostomia {Evalea) val- 

 ensi Dall and Bartsch, which is a recent form, but additional material 

 cies makes it possible to determine the limits of variation of it and 

 also requires that this shell be given a distinct name. 



ODOSTOMIA (EVALEA) ANDERSONI, new name. 



Eulimella californica Anderson and Martin, Proc. Cal. Acad. Sci., 1914, p. 

 67, pi. 7, figs. 19a, 196, and 19c, not Odostomia (Evalea) California Dall 

 and Bartsch, Bull. 68, U. S. Nat. Miis., 1909, pp. 20-25. 



This is an Odostomia belonging to the subgenus (Evalea) ; the 

 name californica being preoccupied makes the new name necessary. 

 The specimens were collected in the Lower Miocene in the bottom of 

 a small canyon, about 11 miles due north of Barker's ranch house, 

 Kern County, California. 



The type No. 141 and cotype No. 142 are in the California Academy 

 of Sciences. The type measures — length, 4.5 mm. ; diameter, 2 mm. 



ODOSTOMIA (ODOSTOMIA) ORCUTTI. new species. 



Plate 46, fig. 8. 



Shell minute, pupoid, pale brown, marked by retractively slanting, 

 incremental lines only. Nuclear whorls deeply immersed in the first 



