616 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



Habitat. — San Antonio Canyon, in the San Gabriel Mountains, western edge of San 

 Bernardino County, California, at about 5,000 feet elevation (Miss Lilian Zech). 

 Miss Zech gives the following account of the locality: 

 The specimen was found in a narrow, winding canyon branching from the main San 

 Antonio canyon at 4,700 feet, and at this point, some 200 or 300 feet higher, as near as 

 I can guess, only wide enough for the creek bed, then full of rushing water, and the 

 trail. It is a cool, moist, deep canyon, with columbine, lilies, and ferns, and on the 

 slopes much bay laurel. The trees were incense cedar and big cone spruce. The 

 snail lay on a pile of rock artificially heaped up at the creek's mouth and contained 

 the dead animal when found. 



EPIPHRAGMOPHORA TRASKII PROLES, new subspecies. 



Plate 116, figs. 4-6. 

 Epiphragmophora traskii proles (Hemphill) Pilsbry, Man. Conch., 1894, p. 199, 



nomen nudum. 

 Epiphragmophora traskii proles (Hemphill) Pilsbry, Clas. Cat. with Loc. Land 



Shells of Amer. North Mex., 1907, p. 4, nomen nudum. 



Shell decidedly flattened, widely, openly umbilicated, thin. The 

 characteristic distantly spaced, obliquely protractively arranged, 

 papulation is almost obsolete in the nuclear whorls as well as in the 

 rest of the shell in the present race. Traces of this sculpture can only 

 be seen on absolutely perfect specimens. Only one individual of all 

 the material examined showed this character, the nuclear whorls in 

 all the rest being slightly worn. The incremental lines of the post- 

 nuclear turns are not strong and the spiral sculpture which consists 

 of exceedingly fine, faintly incised lines, which are best seen on the 

 penultimate whorl, becomes lost on the last turn, both above and on 

 the base. 



I have selected one of the three specimens collected by Mr. Henry 

 Hemphill at Frasers Mills, Tulare County, California, which are 

 listed as Cat. No. 62270, Philadelphia Academy of Sciences collection, 

 as type. This has 5. 1 whorls and measures — greater diameter, 20.1 

 mm.; altitude, 11.1 mm. 



I have seen the following additional adult specimens: 

 Measurements of Epiphragmophora traskii proles. 



Two not quite matured from the same place. 



