306 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 5G. 



last whorl about 16) even regular similar threads with subequal 

 interspaces which pass over but do not nodulate the ribs; aperture 

 narrow, outer lip thickened, crenulate by the sculpture, not reflected; 

 anal sulcus shallow but conspicuous; pillar lip smooth, the pillar with 

 a layer of enamel with a raised edge, canal short, deep, but hardly 

 differentiated. Height 2,3; diameter 1.5 mm. U. S. Nat. Mus. Cat- 

 No. 214266. 



Type-locality. — Panama Bay in 29 fathoms, U. S. Bureau of Fish- 

 eries, Station 2799. 



Genus CANCELLARIA Lamarck, 1799. 



After a careful examination of the literature, including the 

 arrangement by Dr. Jousseaume, I have come to the conclusion 

 that the Californian species of the genus CanceUaria in its wider 

 sense can not properly be included in any of the groups into which 

 it has been hitherto divided. I hav« therefore proposed^ for them 

 the subgeneric na,me of Progabhia in honor of William M. Gabb, 

 an indefatigable worker in recent and fossil Conchology and one of 

 the earliest paleontologists on the west coast. The type is Cancel- 

 laria cooperi Gabb, one of the finest and probably the largest species 

 of CanceUaria living. The hirsute species like C. crawfordiana Dall 

 may be regarded as forming a section Crawfordina. 



ADMETE RHYSSA, new species. 



Shell small, white, with an olivaceous periostracum, a loosely 

 coiled (decorticated) nucleus, and about four subsequent whorls 

 separated by a distinct suture; axial sculpture of (on the last whorl 

 a dozen) rather narrow, nearly vertical ribs, which extend from 

 suture to suture on the spire and from the suture to the margin of 

 the base in the last whorl, with wider interspaces; incremental lines 

 rather marked; spiral sculpture of (on the spire four, on the last 

 whorl eight) prominent threads with wider interspaces, overriding 

 the ribs and coming to a node when they intersect them; the base 

 nearly smooth except for one or two minor threads near the canal ; 

 aperture semilunate, the outer lip thin, body with a thin layer of 

 enamel; pillar with three oblique plaits, canal shallow, short, with 

 a faint fasciole; height of shell, 7; of last whorl, 5; diameter, 4.5 

 mm. U. S. Nat. Mus. Cat. No. 211241. 



Type-locality. — U. S. Bureau of Fisheries station 4343, off the 

 South Coronado Island, in 155 fathoms, sandy bottom. 



MARGINELLA ALBL'MINOSA, new species. 



Shell large, creamy white, thin for its size, brilliantly polished, 

 with a translucent yellowish depressed nucleus of two whorls and 



1 Proc. Biol. Soc. Wash.,voI. 31, p. 138, Nov. 29, 1918. 



