21:0909 Dacridium pacificum Dall. < 
21:0910 ?Daphnella filosa Cpr. is Mitromorpha f. 
21:0911 Daphnella interfossa Cpr. in part is aensitia: i. var. 
pedroana. 
21:0912 Dentalium nechexagonum Sharp. & Pils. 2441. % 
_. Fide Arnold, in part D. hexagonum,in part D. pseudohexa- 
gonum Dall. a / 
21:0913 Dentalium pseudohexagonum Dall. 
Shell 28 mm long, 1-2.8 in diam.; curved, tapering pa: 
orly, rather heavy; surface ornamented with 9 prominent, 
rounded, elevated, longitudinal ridges, with concave interspaces; 
cross-section 9-sided; aperture round. San Pedro and San Diego, 
Cal. (Pleistocene). 
ae 
21:0914 Dentalium semistriatum semipolitum Br. & Sby. . 
Shell thin, white, with numerous fine ridges from apex 
c as the length; apts tom circular; small. Southern California. 
775 
21:0915 Dione nobilis Rve. is Amiantis callosa. 
21:0916 Dispotaea dumosa Conr. is Crucibulum spinosum. 
21:0917 Dolichotoma. Bellardi, is sec. Pleurotoma. 
21:0918 Donax californicus Crp. (non Conr.), is laevigata. 
21:0919 Donax flexuosus Cp. (non Bld.), is D. californicus Conr. 
21:0920 Donax obesus Gld. is laevigata. 
21:0921 Donax stultorum Mawe. is Tivela:s. 
21:0922 Dosinia callosa Conr. is Amiantis c. 
21:0923 Drillia johnsoni Arnold, 1903. 
San Pedro, Cal. (Pleistocene), 
21:0924 Drillia merriami Arnold, 1903. 
San Pedro, Cal. (Pleistocene). 
21:0925 Drillia montereyensis Stearns, 1873. 
Monterey, Cal. 
21:0926 Drillia penicillata Cpr. is D. inermis var. p. 
21:0927 Drillia pudica Hinds. -— 
‘ Distinguished from D. torosa by long transverse ribs and 
more convex outline of whole shell. Central America (living) ; 
San Pedro, Cal. (Pleistocene). 
21:0928 Drillia renandi Arnold, 1903. 
San Pedro, Cal. (Pleistocene). 
21:0929 Dunkeria laminata Cpr. is Turbonilla 1. 
21:0930 Eulima Risso, is Melanella. 
21:0931 Eunaticina oldroydii Dall. 
Dredged in deep water along the Southern California shores; 
shell thin, delicate, with almost sridpile ines seulpturing. About 
36 mm in diam. : 
21:0932 Evalia A. Ad. is sec. Odostomia. 
21:0933 Fissurella aspera Esch. is Fissuridea a. 
21:0934 Fissurella crenulata Sby. is Macroschasma c. 
21:0935 Fissurella inaequalis Sby. is Fissuridea i. 
21:0936 Fissurella pica Sby. is Fissuridea inaequalis. 
21:0937 Fissurellidaea bimaculata Dall, is Clypidella b. 
