MARINE UNIVALVES 



131 



found occasionally that has a brown, hairy epi- 

 dermis. Specimens of this shell are most common 

 on the coast ot southern California. 



Figure loi represents the shell 

 of the rare and beautiful Bathy- 

 toma carpenteriana^ Gabb, Car- 

 penter's Turret-shell, {Surcula 

 carpenteriand). This shell is 

 spindle-shaped, with a conical 

 spire, sometimes more slender 

 than is represented in the figure, 

 which slopes with the utmost 

 grace to the apex. The aperture 

 is long and the outer lip sharp 

 and thin. In perfect specimens 

 the lip is recurved near the su- 

 ture, making a small notch, but 

 this feature is seen better in the 

 next genus. The shell is marked 

 with many fine lines of growth, 

 each of which retains the pecu- 

 liar curve of the notch. The 

 color is brownish yellow, which 

 is set off by numerous narrow, revolving stripes of 

 reddish brown. The length of a good sized speci- 

 men is three inches. This species lives along the 

 coast of California, particularly off the southern 

 coast, and most of the specimens have been obtained 

 by dredging. An allied species, Bathytoma stearnsi- 

 ana, Raymond, shorter, smoother, and relatively 

 broader than B. carpenteriana, has been dredged off 

 San Diego and in other places off the southern coast. 



Fig. 101 



