The Nautilus. 



Vol.. XVI. OCTOBER, 1902. No. 6. 



HELIX VAR. CIRCUMCARINATA AND PYRAMIDULA ELRODI. 



BY ROBT. E. C. STEARNS. 



I have to thank Mrs. M. Burton Williamson of this city for the 

 opportunity to examine a specimen of Pyramidula elrodi described 

 by Dr. Pilsbry on pages 40-41 of The Nautilus for August, 1900. 

 As the example was sent to Mrs. Williamson by Professor Elrod 

 there is no doubt as to its authenticity. Tiie form is unquestionably 

 the same as that described bv me in the Annals of the N. Y. Acad, 

 of Sciences, Volume I, November, 1879, as Helix var. circumcari- 

 nata,^ Mrs. Williamson's specimen differing only in size, being .85 

 as compared with .92 and 1.01 of an inch, greater diameter, of my 

 examples. 



Several specimens of circumcarinata were given to me by the late 

 A. W. Crawford, of Oakland, some before and some after my de- 

 scription was written. He had numerous examples, received from 

 an acquaintance or friend, who gave "Turloch,in Stanislaus county, 

 Cal.," as the locality where he had found them. Subsequently Mr. 

 Craw^ford discovered he had been deceived and stated the true local- 

 ity as being " near Columbia, in Tuolumne county." His friend 

 may have been guilty of a second fib. As I noticed certain charac- 

 ters suggestive of possible relationship to the well-known Epiphrag- 

 mophora mormomim, which occurs in the Tuolumne region, I have 

 regarded the later habitat given by Mr. Crawford as quite probable. 



'See Binney's Manual of Am. Land-Sliells, 1885, p. 141; also, Pilsbry's 

 Catalogue, Phila., 1898, p. 4. 



