36 
21:0458 Anomalocardia subimbricata Sby. 645. 2321. 
Orcutt 10163: Magdalena bay, not abundant? 
21:0459 Trivia solandri Gray. 181. 3049. 
Orcutt 10102; Magdalena Island, on both ocean and bay 
beaches, washed up by the thousands during March, 1917. — 
21:0460 Acmaea patina Eschscholtz. 90. 450. 
Santa Mangarita Island (Stearns). 
21:0461 Chione neglecta Cpr. 
Cerros Island to Magdalena bay (Stearns). 
21:0462 Cypraea sowerbyi Kiener. (Is C. annettae). 
21:0463 Cerithium maculosum Kiener. 2291. Panama. 
Orcutt 10285: Magdalena bay,but few seen. 
21:0464 Cardium (Laevicardium) elatum Sby. 379. 122. 
Orcutt 10281: Magdalena bay, valves frequent on the 
beaches, and it is said to be collected for food. It was formerly 
abundant at San Diego, California, where it is now virtually ex- 
tinct. At San Ignacio Lagoon there is said to be an island largely 
composed of this shell. Common in the Gulf of California, Guay- 
mas, etc. 
21:0465 Monoceras lugubris Sby. 151. (Is Acanthina lugubre.) 
21:0466 Cassis (Levenia) coarctata Sby. BS 
Orcutt 10288: Magdalena bay, common. Tres Marias 
(Stearns). 
473 Serpulorbis squamigerus Carpenter. 
21:0467 Turbo (Callopoma) fluctuosum Wood. 
Orcutt 10510. Magdalena bay, abundant. Peru (Stearns). 
21:0468 Purpura triserialis Blainv. (Is Thais triserialis). 
The following are additional species reported by Dr. Stearns 
from localities both north and south of Magdalena bay, where they 
might be expected to occur. Those found by the writer are indi- 
cated. 
21:0469 Dentalium semipolitum Desh. 775. 
Orcutt 10479: Magdalena bay, apparently rare. San Ignacio 
Lagoon (Hemphill fide Stearns). 
21:0470 Cytherea (Callista) newcombiana Gabb. 
Catalina Island to Gulf of California (Stearns). 
21:0471 Diplodonta (Felania) serricata Reeve. 
Orcutt 10254: Magdalena bay, abundant; also found abund- 
ant at Santo Domingo (north of Scammon’ Ss Lagoon); Mazatlan. 
21:0472 Scintilla cumingii Desh. 
Todos Santos bay, Baja Cal. (Stearns), to Gulf of California; 
not seen; said to be rare. 
21:0473 Lasea rubra Mont. variety subviridis Cpr. 
Monterey, Cal., to Cape San Lucas (Stearns). Not detected. 
21:0474 Labiosa undulata Gould. 136. 846. 
Orcutt 10282: Santa Maria bay, in drift. Abundant in the 
Pleistocene deposits on Magdalena Island. 
21:0475 Tagelus californianus Conrad. 101. 
Numerous valves in the kitchen middens, on Magdalena Island, 
were apparently this species. California to the Gulf of Cal. 
(Stearns). a 
The following seven species were not detected: 
125 Arca Multicostata 
2312 Chiton albolineatus Sby. 
