360 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



preceding suture, the shell is adorned with alternating light and 

 dark patches or clouds of color. Typical specimens come from 

 Neeah Bay, Washington, and bear the number 12612a. 



CALLIOSTOMA CANALICULATUM, new variety NEBULOSUM. 



Shell resembling the typical form except that the whorls are 

 painted with small brown nebulous patches in a radial fashion; 

 specimens of this kind from San Diego, California, illustrate the 

 variety and are numbered 159251. 



CALLIOSTOMA CANALICULATUM. new variely TRANSLIRATUM. 



Another variation occurs in the northern part of the range of this 

 species, from Sitka to the Straits of Fuca, in which the channels 

 between the yellowish spiral cords are of a dark reddish brown, 

 giving the shell a somber appearance, much in contrast with the 

 light straw-colored type from southern California. Specimens of the 

 former kind are in the collection from Biorka Island, Sitka Sound, 

 and are numbered 160558. 



A dark and comparatively small form of C. gloriosum Dall seems 

 to be characteristic of specimens from the southern extreme of the 

 range of this species, especially in the vicinity of San Diego. 



SOLARIELLA RHYSSA, new species. 



Shell small, trochiform, translucent, with four whorls, including 

 a smooth nucleus of a whorl and a half; suture distinct; whorl- 

 section circular; axial sculpture of (on the last whorl 35) narrow 

 threadlike ribs, regularly spaced, uniform, the interspaces wider; 

 extending from the suture to the verge of the umbilicus; spiral 

 sculpture of minute spiral threads showing in the interspaces under a 

 lens, but not modifying the axial ribs; umbilicus wide, funicular; 

 aperture circular, simple, sharp edged; operculum brown, multi- 

 spiral, horny; height, 1.7; longer diameter, 2 mm. U. S. Nat. Mus. 

 Cat. No. 173803. 



Type-locality. — Catalina Channel, California; collected by Prof. 

 F. W. Kelsey. This shell is probably not quite adult. 



SOLARIELLA TAVERNIA, new species. 



Shell small, white, with a subglobular nucleus and three and a half 

 subsequent whorls; suture distinct, deep; spiral sculpture on the 

 spire of four or five equally distributed and subequal small threads 

 with wider interspaces and a narrow flattish space in front of the 

 suture; intercalary threads appear on the penultimate whorl and 

 on the first half of the last whorl they become numerous, covering the 

 whole surface uniformly, but a little coarser on the verge of the 

 umbilicus which is moderately wide and deep ; this sculpture becomes 



