128 WEST COAST SHELLS 



that strictly belong with the air-breathers. 



The first one is named Melampus olivaceiis^ 



Cpr., the Olive Ear-shell. It has a compara- 

 Fig. 97 tively strong shell, with a narrow, ear-shaped 



aperture, a short spire, and a pear-shaped 

 outline. As is shown in Figure 97, there are two 

 folds on the columella. Dark brown, with lighter 

 stripes and bands; length, half an inch. This spe- 

 cies occurs plentifully on salt mud-fiats along the 

 southern coast of California. 



The next species is named Phytia myosotis^ Drap., 

 the Mouse-ear Alexia. The shell is brown and 

 spindle-shaped, similar in form and size to a small 

 grain ot wheat. Probably it was imported from 

 Europe, as it is found around Atlantic sea-ports, 

 and also near San Francisco. 



Carychium exiguum^ var. occidentale^ Pils., the 

 Western Carychium. Shell minute, distinctly coni- 

 cal, whitish, with an evident spire of fine rounded 

 whorls. Aperture nearly circular, columella with 

 a distinct tooth. From Portland, Oregon. The 

 shell is about one-sixteenth of an inch in length; it 

 is found about wharves and on stones which are 

 sometimes covered with tide-water. 



Pedipes unisulcatus^ J. G. Cooper, the Furrowed 

 Pedipes. Spire short, body-whorl large and full, 

 columella marked with very large and peculiar white 

 folds. Surface light brown, length one-fourth of an 

 inch. Southern. 



Siphonaria pel to ides ^ Cpr., the Shield-like Siphon- 

 shell, has a limpet-shaped shell, small, thin, and low 

 arched, with the apex a little to one side of the cen- 



