42 CALIFORNIA ACADEMY OF SCIENCES. 



71. Neritina picta Broderip. 25, San Jose del Cabo 



only. 



72. Neritina californica Reeve. Same place, in 



creek. 



73. NuTTALiNA scabra Reeve. i, a dry beach speci- 



men. 



74. Oliva ARANEOSA Lamarck. 15, mostly beach-worn. 



75. Oliva porphyria Linne. 15, fresh specimens. 



76. Olivella dama Duclos. 150, common at low wa- 



ter. 



77. Olivella myriadina Duclos. 45, called "rice 



shell." 



78. Oniscidia tuberculosa Reeve. 2, good speci- 



mens. 



79. Opalia crenatoides Carpenter, i, a rare species. 



80. Pleurotoma nobilis Hinds, i, a fresh specimen. 



81. Pleurotoma olivacea Sowerby. Several, beach- 



worn. 



82. PoTAMiDES MONTAGNEi Orbigny. 2, rare in the gulf, 



83. Purpura biseriata Blainville. 8, living at low 



water. 



84. Purpura patula Linne. 60, living at low water. 



85. Purpura triserialis Blainville. 4, living at low 



water. 



86. Pyrula decussata Wood. 5, eaten by the natives. 



87. Rissoina stricta Menke. On alg^, San Jose del 



Cabo. 



88. ScALARiA hexagona Sowcrby. • 2, five -angled ex- 



amples. 



89. SiPHONARiA PELTOiDES Carpenter, i, beach spec- 



imen. 



90. SiPHONARiA LECANiuM Philippi. I, rare in gulf? 



91. SisTRUM CARBONARiuM Rccve. I, rare; identified 



bv Dall. 



