SOUTHERN CALIFORNIA ACADEMY OF SCIENCES 119 
which were derived from this source, but they exist but a little 
while and do not propagate, the water not being warm enough 
for them. This source of error should always be kept in mind 
at localities where sailing craft are hauled out to be cleaned.”’ 
Seceral specimens were collected in 1894, and these were la- 
belled *‘‘San Diego,’’ and distributed. Consult P. P. Carpenter’s 
‘‘Catalogue of Mazatlan Shells,’’ page 148, for note on this 
species at Mazatlan and as far south as Panama. 
MYTILIDA 
Genus Lithodomus Cuvier 
Lithodomus (Myoforceps) aristatus Dillw. 
La Jolla, Cal, 1899, by Prof. F. W. Kelsey, of San Diego, who 
has collected many species of rare shells on our Southern 
California Coast. Dates and localities—unless stated otherwise 
—refer to time and collecting ground of specimens received by 
me. For habitat and ‘synonomy of this species (Lithophagus 
aristatus Sol) see Carpenter’s Maz. Shells, page 126. 
PECTINIDA 
Genus Pecten Miller 
Pecten hericeus var. hindsii Cpr. 
Dredged shells from Puget Sound from Fred L. Bulton, Ks- 
quire, who writes that P. islandicus from Puget Sd. is this shell. 
Consult Dr. Dall on the ‘‘Pelecypoda’’ in Trans. Wagner Free 
Ins. Scie., Vol. III, Part 4. 
OSTREIDA 
Genus Ostrea Linné 
Ostrea amara Cpr. O. luride var. 
On rocks, Quarantine, San Diego Bay, Phot F. W. Kelsey. 
Dir dG: Cooper lists this ‘“‘San Diego, California? to Panama,’ 
in his ‘‘Catalogue of W. North. “Amer. and Many Foreign 
Shells, with their Geographical Ranges, for Labels, ete.’’ State 
Min. Bu. Apr. 1894. 
Ostrea, conchaphila Cpr. O. luride var. 
‘On eans, bottles, shells, ete.,’’ (Prof. Kelsey), San Diego 
Bay. Reported fossil by Dr. Ralph Arnold, onion oie Cal. 
Acad. Sciences,’’ Vol. III, page 49. Dr. Lorenzo Gordon Yates 
lists this in ‘‘The Mollusea of Santa Barbara, ete.,’’ page 41. 
