24 CALIFORNIA SEA-SHELLS. 



move. The shells sometimes exceed an inch in 

 length, but commonly are smaller. 



Olivella bcetica, Cpr., Slender Olive, Fig. 7, 

 PI. IV, has a thin, slender, brownish white shell. 

 It is smaller and less abundant than the former 

 species, and can easily be distinguished by its 

 longer spire, attenuated form, and brownish 

 color. These two species comprise nil the known 

 California Olive shells. 



Gonus Calif ornicus, Hds., Fig. 1, PI. Y, is 

 our only representative of the great Cone family, 

 which has so many beautiful members in tropical 

 waters. Our little species is very humble, being 

 about an inch in length, of a chestnut color, 

 smooth, though sometimes found covered with a 

 hairy epidermis. The dead shells may often be 

 found cast up on the beach. 



Fig. 2, PL V, represents a shell often found 

 somewhat broken, named DriUia torosa by Car- 

 penter, which we may translate in part as the 

 Knotty Drillia. Its color is from olive to black ; 

 length, from one inch to an inch and a half, 

 spindle shaped, spire of five or six whorls, orna- 

 mented by a spiral row of knobs. It is found 

 frequently at Monterey. 



Drillia penicillata, Cpr., Fig. 3, PI. V, Pen- 

 cilled Drillia, is a very beautiful species, found 

 at Santa Barbara and southward. It is larger 

 and more graceful than the last named, brownish, 

 with delicate markings, spire of eight whorls ; 

 length, one inch and a half. 



Lnponia ( or Cypraca ) spadicea, Gray, Fig. 

 4, PL V, Nut-brown Cowry, is a beautiful shell. 



