19. Mytilus Califoinianus, Conr. 



20. edulis, Linn. 



21. Modiola fornicata, Cpr.* 



22. recta, Com-.* 



23. Axinoea subobsoleta, Cpr. 



24. Pecten hastatus, Shy. 



25. Hinnites giganteus, Gray. 



26. Placunanomia machrochisma, Desli. 



27. Helix Niekliniana, Lea. 



28. Columbiana, Lea. 



29. Cryptochiton Stelleri, Midd. 



30. Tonicia lineata. Wood. 



81. Mopalia Wossnessenskii, Midd. 



32. Merckii, Midd. 



33. Kennerlyi var. Swanii, Cpr. 



34. Trachydermon fallax, Cpr. (Mss.) 



35. Naeella instabilis, Gould. 

 3t5. Acma>a patina, Esch. 



37. pelta, Escli. 



38. persona, Eseh. 



39. scabra, Nutt.* 



40. spectrum, Nutt. 



41. Scurria mitra, E.sch. 



42. Rowellia radiata, Cp.* 



43. Glyphis aspera, Esch. 



44. Clypidella callomarginata, Cpr.* 



45. bimaculata. Da 11, ("Mss.)* 



46. Haliotis rufescens. Swains.* 



47. Leptothyra sanguinea, Cpr. 



48. Chlorostonia funebrale, A. Ad. 



49. brunneum, Phil. 



50. Calliostoma costatum. Mart. 



51. annulatum. Mart. 



52. Phorcus pulligo. Mart. 



53. Margarita pupilla, Gould. 



54. acuticostata, Cpr.* 



55. Crepidula adunca, Sby. 



56. Hipponyx cranioides, Cpr. 



57. antiquatus, Linn.* 



58. Bivonia compacta, Cpr. 



59. Bittium filosum, Gould. 



60. Littorina planaxis, Nutt. 



61. scutulata, Gould. 



62. Lacima porrecta. Cpr. 



63. Trivia Californiana, Gray.* 



64. Erato vitellina, Hds.* 



65. Drillia incisa, Cpr. 



66. Mangelia levidensis, Cpr.f 



67. Odostomia gravida, Gould.* 



68. Scalaria subcoronata, Cpr.* 



69. Opalia borealis, Gould. 



70. Velutina laevigata, Linn. 



71. Lunatia Lewisii, Gould. 



72. Olivella biplicata, Sby. 



73. boetica, Cpr. 



74. intorta, Cpr.* 



75. Nassa fossata, Gould. 



76. mendica, Gould. 



77. Amycla carinata var. Hiudsii, 



78. gausapata, Gould. 



79. Amphissa corrugata, Rve. 



80. Purpura crispata, Chem. 



81. canaliculata, Duel. 



82. saxicola var. ostrina, 



83. Ocinebra lurida, Midd. 



84. var. aspera, Baird. 



85. interfossa, Cpr. 



86. var. atropurpurea, Cpr. 



87. Cerostoma foliatum, Gmel. 



Rve. 



Gld. 



*The species marked with an asterisk, seventeen in number, have never before been 

 reported from a locality so far north. 



t Mangelia levidensis (teste J. G. Cooper) has not previously been detected at a point so 

 far south ; it has heretofore been credited to " Straits of Fuca, W. T." ride Geo. Survey Cat. 

 1867, by J. G.C. 



t Tapes staminea and vars. were obtained at low water by digging from twelve to twenty 

 inches deep, and together with Macoma secta and M. nasuta, were found in the same holes. 



The Chitons above enumerated, have been compared with specimens recently (March, 

 1868) received labeled, from Dr. Carpenter of Montreal. 



No. 39, Acmaea scabra; elevated dark colored specimens of this species with the charac- 

 teristic sculpture sharply and well defined, were obtained in considerable numbers. Subse- 

 quently at Monterey I found occasional specimens displaying nearly the same elevation 

 and ot the same color as those from Bodega. 



