126 THE NAUTILUS. 



A NEW KFIPHBAOMOFHORA FBOM THE COAST BANOE OF 



CALIFORNIA.' 



1)Y PAUL BAUTSCH. 



Epiphragmophorn tudicvlata colusaejisis, new subspecies. 



Shell depressed helicoid, pale brown with an olive tinge above 

 and olive with a brownish tinge below, provided with a narrow 

 chestnut-brown suprai)eripheral spiral band which is fringed on 

 each side by a narrow zone a little lighter than the ground color; 

 inside of the aperture and the slightly reflected lip, pale 

 purplish, the spiral brown band and its bordering lighter zones 

 well marked. Nuclear whorls one and three-fourth?, well 

 rounded, minutely granulated; the succeeding turns marked by 

 more or less regular obliquely retractively curved riblets, which 

 are about half as wide as the spaces that separate them. The 

 last turn shows a few irregularly distributed malleations on the 

 upper surface. Base narrowly umbilicated, the umbilicus 

 about half covered by the reflected columella. The under sur- 

 face of the whorls are well rounded and marked by the contin- 

 uations of the axial riblets which extend feebly into the umbil- 

 ical area, becoming crowded in this region. The peripheral 

 half of the base shows numerous malleations while the umbil- 

 ical half is almost devoid of them. Immediately behind the 

 reflected peristome there is a concentration of fine pustules 

 which are densely scattered over about one-twenty fifth of the 

 last whorl; within the umbilicus they extend back a little farther 

 covering probably a tenth of a tui'n. Aperture large, very 

 broadly oval; peristome slightly reflected, inner lip decidedly 

 reflected, parietal wall covered b}-- a thin callus. 



The type, Cat. No. 334721, U. S. N. M., and two additional 

 specimens were collected by ftfr. G. Willett "in an old rock 

 slide on the north slope near the summit of a hill about a mile 

 southeast of Sites, Colusa County, California, January 29, 

 1919," that is, on the east slope of the coast range north of San 

 Francisco Bay. The tvpe has 5 J turns and measures: altitude 

 15 mm., greater diameter 24.4 mm., lesser diameter 19.6 mm. 



' Published by permission of the Secretary of the Smithsonian Institution. 



