SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 127 
CALYPTRAIDA 
Genus Crepidula Lamark 
Crepidula nivea var. glottidiarum Dall. 
On Glottidia albida Hds. on mud flats in San Pedro Bay by 
Mrs. W. H. Eshnaur. Not in my collection. Described in The 
Nautilus, Vol. XIX, No. 3, page 26, by Dr. Wm. H. Dall. 
Crepidula rugosa var. naticarum, W. 
On Lunatia lewisii in San Pedro Bay. 
Crepidula rugosa var. morrisiarum, W. 
Variety on Norrisia norrisii Sby. This and the preceding one 
were described in The Nautilus for Sept. Vol. XIX, page 50. 
These varieties of Crepidula have been described since Prof. 
Keep’s book was published. 
NATICIDA 
Genus Lunatia Gray 
Lunatia pallida Brod and Sby. 
Victoria, B. C., from the Rey. George W. Taylor, in 1898. 
This species 1s described and figured in Tryon’s Man. Conch. 
Vol. Vol. VIII. The Rev. George W. Taylor, F. Z. S., ete., says 
of this species that it ‘‘may easily be distinguished from the 
young of L. lewisii by the shape of the whorls and by its much 
smaller umbilicus.’’ Preliminary Catalogue Marine Mollusea 
Pacifie Coast of Canada, page 83. 
Genus Polinices Montford 
Polinices recluziana var. alta Dall. 
This var. is oceasionally found in San Pedro Bay. While the 
type has the spire only shehtly elevated alta has a very elevated 
spire, the whorls, especially the body-whorl, bemg mueh flat- 
tened, giving the shell great length from the apex to the outer 
lp below the columella. I have one specimen that measures, 
in this way, 70 mm. in height, width 58 mm. Tryon’s Manual 
of Conchology, Vol. VIII, describes what appears to be a varia- 
tion rather than typical recluziana; the figure, plate 12, fig. 1. 
is also that of an elongated form. Consult Arnold’s Memoirs, 
Cal. Acad. Sciences, Vol. III, for typical recluziana and this 
var.; also Keep’s W. Amer. Shells, page 228, for deseription 
and figure of typieal species. 
ACM AID 45 
Genus Acmea Eschscholtz 
Acmeza patina var. scutum Esch. 
Occasionally found with the type; it is readily detected, be- 
ing thinner and having the ‘‘spot’’ in the interior darker. If 
