64 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.56. 



and somewhat constricted in front of the appressed suture; there 's 

 no evident anal fascicle apart from the constriction; aperture nar- 

 row, anal sulcus hardly evident, outer lip sharp, moderately varicose, 

 smooth inside, with the spiral sculpture showing through the thin 

 shell; inner lip erased, pillar straight, canal produced but hardly 

 differentiated. Height of shell, 10; of last whorl, 6; diameter, 3.5 

 mm. Cat. No. 159338, U.S.N.M. 



Range. — San Diego Bay, California, C. E. Orcutt. 



This belongs to the same group as P. I'lmonitella Dall, of the At- 

 lantic coast. 



MANGILIA (KURTZIELLA) ARTEAGA ROPERI, new variety. 



Plate 22, fig. 5. 



Shell small, thin, grayish with a very minute apical follov^^ed by 

 two more or less reticulate convex nuclear whorls and four and a 

 -half subsequent whorls; suture distinct, not appressed; spiral sculp- 

 ture of on the upper whorls one strong peripheral cord in front of 

 which on the penultimate whorl is a smaller one and on the last whorl 

 about five smaller ones with wider interspaces, on the canal five or 

 six closer small threads; in the interspaces of the major cords are 

 numerous minute and minutelj^ imbricated close-set threads, giving 

 a rasplike surface; axial sculpture of (on the last whorl nine) nar- 

 row rounded threads with wider interspaces, extending from the 

 fasciole to the canal and nodulous at the intersection of the periph- 

 eral cord; aperture narrow, simple, anal sulcus feeble, producing 

 hardly any appearance of a fasciole; axis nearly pervious, canal 

 short, straight. Height of shell, 6.5; of last whorl, 4; diameter, 2.5 

 mm. Cat. No. 150993, U.S.N.M. 



Range. — Monterey, California, to Lower California, in 12 to 15 

 fathoms. 



This species belongs to the group represented on the Atlantic coast 

 by such species as M. Umonitella Dall, M. cerina Kurtz and Stimp- 

 son, etc., notable for their rasplike minor sculpture. It is more 

 slender than the typical M. arteaga and more southern in distribu- 

 tion. The nucleus is usually eroded and then appears smooth. If 

 deemed worthy of a sectional distinction I have suggested the name of 

 Kurtziella^ with M. cerina as the type. 



MANGILIA (KURTZIELLA ?) BETA, new species. 

 Plate 22, fig. 4. 



v^hell small, yellowish, with a pale canal, a blunt smooth nucleus 

 of two Avhorls and tliree and a half subsequent whorls; periphery 

 slightly behind the middle of the whorl ; from the distinct suture the 

 surface slopes flatly to the subangular periphery, the rest of the 

 whorl rounded; spiral sculpture of uniform fine threads with nar- 

 rower interspaces over the whole surface; axial sculpture of (on the 



