HANNA: MIOCENE LAND SHELLS. 9 



Type in the University of Kansas from Cove Inlet, John Day river, 

 Oregon, collected by Mr. H. T. Martin in 1907. 



A single well-preserved specimen was secured. While it 

 resembles in general shape some of the old world species, as 

 Pomatia aspera for instance, it is believed to be more closely 

 related to the albolabris group of Polygijra. It must be 

 stated, however, that important differences exist. The shell is 

 more globose than other species of this genus and the umbilical 

 region is more deeply impressed. While most of the margin 

 is broken away, enough remains to show that it was folded 

 back upon itself in the basal region and the body whorl was 

 obtusely keeled in this region. 



The shell resembles in some respects the Helix leidyi of 

 Hall and Meek {White, 3d. Ann. Rep. U. S. Geol. Surv., p. 455, 

 pi. XXXII, figs. 32, 33, 1881-82), but it is proportionately 

 more elevated and the body whorl is deeper in a vertical direc- 

 tion. The two species belong to the same section of the genus 

 which may be defined by the form of the lower apertural mar- 

 gin and the angular body whorl in the umbilical region. 



The species is named in honor of Mr. Martin, an indefatiga- 

 ble collector of fossils. 



Epiphragmophora dubiosa Stearns. 



E piphragmophora dubiosa Stearns, Science, new series, vol. XV, p. 153, 1902. 

 (Original description.) 



E piphragmophora dubiosa Stearns, Univ. of Calif. Pub. Geol.. vol. V. p. 69, figs. 3, i. 

 1906. Original description repeated and figures provided. 



Only one specimen of this interesting species was found. The shell 

 is imperfect, as was the type, but enough remains to show that it is 

 narrowly umbilicated; very flat below and spire but little elevated; 

 whorls flattened above and sutures but little impi-essed; the pitting on 

 the apex mentioned by Stearns cannot be seen, but this may be due to the 

 worn condition of the shell substance; for the same reason the growth 

 striae are not well preserved. Greatest diameter, 23. Altitude, 12. 

 Whorls, five and three-fourths. 



It is not certain that the form is placed in the correct genus, 

 but without better preserved material for study it would be 

 useless to attempt any other disposition. Doctor Stearns 

 states and shows in his figure that the sutures are deeply im- 

 pressed. It is believed, however, that this is not natural, as 

 the Kansas University specimen and four others seen in the 

 University of California did not show them noticeably deep- 

 ened. Snails of this group are known to be subject to con- 



