CLASS GASTROPODA 
161 
Family PHASIANELLIDAE 
Genus PHASIANELLA Lamarck, 1804 
Shell bulimiform or subglobose, polished, without epidermis or nacre, 
variegated with bright colors; operculum heavy, calcareous, internally 
paucispiral, with nucleus near the basal margin, externally convex, white. 
Type. Phasianella bulimoides Lamarck. 
Distribution. Australia, India, Philippines, Mediterranean, Britain, 
West Indies, west and east coasts of North America. Fossil Devo¬ 
nian . . . . ; Europe and California. 
Subgenus Tricolia Risso, 1826 
Phasianella compta Gould, 1855 
H. R. Doc. 129, Preliminary Report, 25: Pacific Railroad Surveys, Report, 5; PI. 11, 
figs. 25, 26. 
Testa parva, solida, ovato-conica, imperforata, polita, cinerascens, lineis 
minutis oblique volventibus olivaceis ornata; spira acuta; anfractibus qua- 
tuor rotundatis; ultimo ad peripheriam obtuse angulato, et interdum tessel- 
latem fasciato; apertura circularis; labro tenui, alvo; columella alba, 
compressa; faucibus callo albo incrassatis. (Gould.) 
Shell small, solid, ovate, imperforate, smooth and shining, ashy white, 
minutely and closely lineated in an obliquely spiral manner with olive 
green. Whorls four, well-rounded, forming an acute spire, the outer one 
obtusely angular at periphery, where there is sometimes a delicate cate¬ 
nated range of white and olive spots, aperture nearly circular; lip very 
thin, showing the lineations on the inner margin; throat coated with bluish- 
white enamel; pillar flattened; white. Operculum patelliform, ivory-like, 
the outer convex surface marbled black and white; the inner surface black. 
Length, %; diameter, % in. 
Locality . Found at San Diego by Mr. Blake and also by Mr. Webb. 
This pretty little shell is usually more or less coated with cretaceous 
matters, but when cleaned exhibits a beautifully lineated surface, peculiar 
on account of the lines running so nearly in the ordinary direction of 
revolving striae. The coloration, however, sometimes consists of olive and 
white tessellations and blotches. It would accord pretty well with P. per¬ 
forata Philippi, did it not lack the distinguishing mark of that species, its 
perforation. 
Type in United States National Museum? Type locality, San Diego, 
California. 
Range. Monterey, California, to Gulf of California. 
[ 763 ] 
