^"1893^''] PROCEEDINGS OF THE NATIONAL MUSEUM. 641 



form like that o^ pallidior on a .smaller scale, varyiuj;' liom moderately 

 wide to slender; whorls rounded or moderately flattened; umbilicus 

 small but decp(n' pi'oportionatcly than '\\\ pitHUVior ; aperture rounded 

 ovate, the lip rather widely retiectcd, thin, the outer and pillar lips 

 approxinuiting, united by a thin wash of callus. 



MedtmremenU of ii slender and a aloid specimen, respectively. 



Milli- I Milli- 

 meter*, metem. 

 Altitude of shdll 28. i 28. 5 



Altitmlo of lii.st wliorl 2:i. 



A Ititiiilo of apert lire 15. 



lliiximiini hroadtli of apertuiB j 11. 5 



Maximum breadtli of shell 17. 



22. r. 

 16.0 

 12.0 

 15.0 



This species is larger than B. Xantu.si and the latter is without a 

 reflected lip. B. Baileyi has the color of excelsus rather than pallidior. 

 Its variations, within the limits of its smaller size, nre similar to those 

 of paUidior; the granulation of the surface in the rougher specimens is 

 much finer, but of the same character as that of J>. montczuma. The 

 species was at first confounded with B. Xantusl, the type of which had 

 been mislaid, but Avlien the latter was found and a series compared, it 

 was obvious that the}' belonged to different sections of the genus. It 

 is named in honor of Mr. Vernon IJailey, of the U. S. Dei)artment of 

 x\griculture, who collected it in western Mexico. 



Section DRYM.S:US Albers. 

 Bulimulus (Drymeeus) californicus ]v»;eve. 



"('alifornia," Hartweg, fide Reeve; Gulf coast of Lower California, 

 Stearns. 



Only one si)ecimem of this little-known species is in the national 

 collection, and it unfortunately has had tlie ])illar broken, apparently 

 in removing the animal. It recalls B. Liebmanni, but is nearest to B. 

 serperantruH Say, bui is more slender than any specimen of scrperastrus 

 observed in our very large series from many localities. The peristome 

 is reflected, especially in front, and the surface is polished. 



Section MESEMBRINUS Albers. 



Bulimulus (Mesembrinus) Xautusi W. a. Biiniey, not Cooper. (Ji. (lahhii, 



Crosse; aiul Fischer. 



Cape St. Lucas, Xantiis (type); Kaiicho Lagunas, I*unta Arena, near 

 sea level, Bryant; Sierra Laguna, near La Chuperosa, altitudi; 2,000 

 feet, Eisen. (Plate lxxii, Fig. 4.) 



The specimen from Avhich ^Iv. Biuney des(Tibed the species, and 

 which was figured to illustrate it, is in the 2^ational Collection (Mus. 

 Reg. 0017) and must b(i regarded as the type. Jtis finely but intensely 

 granular from the s])iral striation, and agrees in every respect with the 

 form described and figured by Crosse and Fischer in their fine work on 

 the Mollusks of Mexico under the name of B. (iahbii. The lip is not 

 Proc. N. M. 03 41 



