vu ‘ 
218 SHELLS OF SAN PEDRO BAY—WILLIAMSON. 
been collected during the past two years, many of which being native 
to Catalina are likely to be found in the bay. For convenience of 
reference these are arranged alphabetically. Those marked with an 
asterisk were obtained at San Pedro, the others are from Catalina 
Island. 
Astarte fluctuata, Cpr. *Kulima compacta Cpr. 
Acanthochiton avicula, Cpr. Gibbula optabilis Cpr. 
*Amphithalamus lacunatus, Cpr. Isapis obtusa Cpr. 
Barbatia gradata Sby. Kennerlyia bicarinata, Cpr. 
Barleeia haliotiophila, Cpr. Lepidopleurus scabricostatus, Cpr. 
Barleeia subtenuis, Cpr. Lepidopleurus pectinatus, Cpr. 
Bittium armillatum, Cpr. Limatula subauriculata, Mont. 
Cacum californicum, Dall. Laqueus californicus, Koch. 
*Cerithiopsis assimilata, C. B, Ad. Lucina tenuisculpta, Cpr. 
*Cerithiopsis columna, Cpr. Macoma inquinata Desh. 
?Chlorostoma pulligo Mart.t Martesia intercalata, Cpr. 
*Chrysallida pumila Cpr. Mytilimeria Nuttallii, Conr. 
Clathurella constricta, Gabb. Opalia retiporosa, Cpr. 
Clathurella erystallina, Gabb. Plectodon scaber, Cpr. 
Crenella decussata, Mont. Psephis Lordi, Baird. 
Cryptodon flecuosus, Mont. Psephis salmonea, Cpr. 
Cyathodonta undulata, Conr, Puncturella Cooperi, Cpr. 
Cythna albida, Cpr. Rissoina interfossa, Cpr. 
Daphnella clathrata, Gabb. *Scala crebricostata Cpr. 
*Diala acuta, Cpr. Semele incongrua, Cpr. 
*Diala marmorea, Cpr. *Styliferina turrita Cpr. 
Dunkeria laminata, Cpr. Terebratella occidentalis Dall. 
Entodesma inflata, Conr. *NXylotrya setacea Tryon. 
SUPPLEMENTARY NOTE. 
Since the time when this list was finished and submitted for publica- 
tion, the collectors of Los Angeles County have not been idle and their 
work has borne abundant fruit. The species added have been incor- 
porated in the proofs, but a few words seem appropriate in regard to 
some of the finds. Miss Shepard, to whose successful energy in col- 
lecting I am greatly indebted for the completeness of this list, has con- 
tinued her work with exceptionally good results; Miss Monks has also 
been remarkably successful, especially in obtaining a fine series of the 
fossil forms of Fusus from the blue clay of Dead Man’s Island and of 
the recent Scala bellastriata and other interesting forms. The living 
specimen of Pecten floridus, referred to in the text, was obtained by 
Mrs. Garlick at Timms Point and is now in the possession of Mr. Or- 
eutt, of San Diego. Mrs. Redding, of Long Beach, has obtained sey- 
eral additional specimens of the Periploma discus. Pleurotoma (Doli- 
chotoma) Carpenteriana var. Tryoniana Gabb has been collected at San 
Pedro by Miss Monks; who has also found specimens of Trophon trian- 
gulatus, of which fine specimens exist in the State collection at Berke- 
ley, where they had till recently been confounded with Chorus Belcheri 
junior. It appears that the number of varices in this species is some- 
tSan Pedro, Perhaps C. Montereyensis worn. 
