123. meiidica, Gould. 



124. — — Cooperi, Fbs. 

 125. tegula, Rve. 



126. Ainycla carinatti, Hds. 



127. tuberosa, Carp. 



128. Amphissa corrugata, Rve. 



129. Purpura crispata, Escli. 



Dr. Newcomb also visited Sauta 

 species : 



1. Waldhcimia Grayi, Davidson. 



2. Saxicava pholadis, Linn. 



3. Semele decisa, Conr. 



4. Acmrea scabra, Nutt. 



5. Lottia gigantea, Gray. 



6. Rowellia radiata, Cooper. 



7. Haliotis Cracherodii, Leach. 

 8. corrugata, Gray. 



9. Pomaulax undosus, Wood. 



10. Trocliiscus Norrisii, Sby. 



11. Clilorostoma gallina, Fbs. 

 12. funebrale, A. Ad. 



130. triserialis, Blve. 



131. saxicola, Val. 



132. Monoceros engonatum, Conr. 



133. Ocinebra interlbssa, Carp. 



134. Cerastoma Nuttalli, Conr. 



135. Muricidea Barbarensis, Gabb. 



Cruz Island, and collected tbe following 



13. Chlorostonia aureotinclum, Fbs. 



14. Trivia Californica, Gray. 



15. Conus Californicus, Hds. 



16. Amycla tuberosa, Carp. 



17. Monoceros engonatum, Conr 



18. Cerastoma Nuttalli, Conr. 



19. Muricidea incisus.Brod. 



20. Trophon triangulatiis, Carp. 



21. Fusus ambustus, Gould. 



22. Argonauta Argo, Linn. 



23. Helix Ayresiana, Nevvc. 



List of Shells collected at Purissima and Lobitas, California, 

 October, 1866. 



BY KOBKRT E. C. STEAKNS, CUKATOR OF CONCHOLOGY, CAL. ACAD. NAT. SCJENCKS. 



" Purissima" and " Lobitas" are the names of two creeks situated a few miles 

 south of Spanish Town, in San Mateo County. Near the points where these 

 streams empty into the ocean are small beaches and groups of flat rocks lelt 

 bare at low tide, limited, however, in extent, as the shore in the neighborhood 

 is for the most part exceedingly bold and precipitous, the ocean at ordinary 

 high water beating against the base of the cliffs. 



Dr. Newcomb and myself visited the localities at the period above men- 

 tioned, and collected the following species from among the drift or upon the 

 rocks : 



1. Waldheimia Grayi, Davidson. 



2. Navea Newcombii, Tryon. 



3. Zirphiea crispata, Linn. 



4. Pholadidea penita, Conr. 



5. ovoidea, Gould. 



6. Netastomella Darwinii, Sby. 



7. Parapholas Californica, Conr. 



8. Saxicava pholadis, Linn. 



9. Platyodon cancellatum, Conr. 



10. Schizotha'rus Nuttalli, Conr. 



11. Lyonsia Californica, Conr. 



12. Mytilimeria Nuttalli, Conr. 



13. Macoma iuconspicua, Br. & Sby. 



14. Standella falcata, Gld. 



15. Tapes staminea, Conr. 



16. ruderata, Desh. 



