20 
186 Crepidula navicelloides Nutt 
Abundant in the interior of dead univalves, varying in size 
according to the shell occupied, 
In dead bivalves assuming the form nummaria Gould 
187 Crepidula dorsata var lingulata Gld ‘ 
Abundant on rocks at La Playa and elsewhere. Very variable 
in form, but well marked by the form of the deck. 
188 Hipponyx tumens Cpr 
Abundant with the next species. 
189 Hipponyx antiquatus L., var serratus Cpr 
Abundant under stones or shelving rocks, ocean beaches. 
190 Scalaria hindsii Cpr and var subcoronata 
Not common. 
191 Scalaria indianorum Cpr 
Not rare; San Diego. Santa Barbara (Yates). 
192 Scalaria bellastriata Cpr 
Very rare. San Diego. 
193 Opalia crenatoides Cpr 
San Diego; not common. Also Todos Sanios bay. 
194 Ianthina bifida Totten 
Specimens often washed ashore at San Diego. 
195 QOdostomia nuciformis Cpr var avellana Cpr 
San Diego. 
196 OQOdostomia inflata Cpr 
Type locality:—-Neeah bay, Washington (Swan). 
San Diego; not rare. Also a variety (?) more slender and 
elevated proportionally, but otherwise similar. 
197 Odostomia zquisculpta Cpr 
Abundant on the shells of Haliotis. 
[San Diego to Cape St. Lucas. D.] 
198 Turbonilla torquata Gld 
Abundant on the shells of Haliotis, San Diego; Todos Santos; 
Santa Barbara. 
199 Turbonilla aurantia Cpr 
San Diego. Santa Barbara (Yates). 
200 Chrysallida pumila Cpr 
{Rare. Todos Santos. D.] 
201 Obeliscus variegatus Cpr 
San Diego bay; dead specimen; rare. 
203 Lacuna variegata Cpr 
On sea-grass; abundant in spring. 
204 Lacuna unifasciata Cpr 
San Diego. Not common. 
