c 



VOL. XVI, PP. 103-104 JUNE 25, 1903 



PROCEEDINGS 



OP THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



A NEW LANDSHELL FROM CALIFORNIA. 



BY PAUL BARTSCH. 



[By permission of the Secretary of the Smithsonian Institution.] 



Mrs. H. L. T. Walcott, of Dedham, Mass., during a recent 

 visit to Palm Springs, San Diego County, California, collected 

 a small lot of land shells which are believed to be an undescribed 

 species of Sonorella. The shells are mostly dead and bleached, 

 and were found in the crevices of rocks, filled with sand. A 

 few individuals however still have part of the animal within 

 them and it may be presumed that the color of these specimens 

 is that of the living shell. This species may be known as: 



Sonorella walcottiana sp. nov. 



Shell moderately elevated, rather thin, polished, of light isabelline 

 color, with a moderately broad dark chestnut band encircling the whorls 

 somewhat posterior to the periphery. This band is bordered on each 

 side by a narrow zone a trifle lighter than the general color of the shell 

 and is usually almost completely covered in all the whorls except part 

 of the penultimate and the last volution. Nuclear whorls one and one- 

 27 PROG. BIOL. Soc. WASH. VOL. XVI, 1903. (103) 



