118 THE NAUTILUS. 



Strait of Juan de Fuca and British Columbia are different, as 

 are those found in Lower California. The West Coast Olivellas 

 are very variable, they differ on some of the Channel Islands, 

 and on some of the islands of the north. I have picked a type 

 from the most prevalent forms along the cost. As far as the 

 recent shells are concerned, we could get along without this 

 division, but they all occur as fossils at San Pedro in various 

 horizons and therefore I suggest these varietal names as a help 

 and convenience in working over the fossils. There has been a 

 color variety described by Mr. Vanatta, but I have used only 

 the form and general outline of the shells, as the fossils have all 

 lost their color. 



OLIVELLA BOETICA DIEGENSIS, n. var. Plate V, fig. 2. 



This differs from the typical shells of British Columbia, in 

 the color being a light drab, sometimes mottled; not as oval in 

 outline, spire longer and running more sharply to a point. 

 Length, 19; breadth, 8 mm. 



Type in the Oldroyd collection, Stanford University. Range 

 San Diego to San Pedro; living. Pleistocene in upper San 

 Pedro. 



OLIVELLA BOETICA MEXICANA, n. var. Plate I, figs. 3. 



This differs from var. pedroana in being smaller, more slender, 

 spire not running quite as sharply to a point. Length, 10; 

 breadth, 4 mm. 



Type is in the Oldroyd collection, Stanford University. Type 

 locality, Scammon's Lagoon, Lower California. Pleistocene, 

 the upper San Pedro. Living at San Pedro. Collected by Mr. 

 Henry Hemphill. 



OLIVELLA BIPLICATA FUCANA, n. var. Plate V, fig. 4. 



Shell broader across the middle and lower part of the aper- 

 ture than var. angelena ; spire running more sharply to a point 

 from the middle of the shell. Color more uniform, being a 

 light drab. Length, 28; breadth, 14 mm. 



Type in Oldroyd collection, Stanford University. Living. 

 Type locality, Straits of Fuca, near Cape Flattery. Pliocene 

 at San Pedro. 



