MARINE SHELLS OF LOWER CALIFORNIA. 47 



166. Pectunculus multicostatus Sowerby. Small 



but perfect examples. 



167. Periploma planiuscula Sowerby. Valves, same 



as P. argentaj'ia Con. 



168. Perna chemnitziana Orbigny. Valves, and some 



perfect examples. 



169. Pinna lanceolata Sowerby. Several specimens. 



170. Pinna maura Sowerby. A few specimens. 



171. Placunanomia cumingi Broderip. Only i valve. 



172. Placunanomia macrochisma Deshayes. Com- 



mon. 



173. Sanguinolaria miniata Gould. 2, entire shells. 



174. Sanguinolaria nuttalli Conrad. A few valves. 



175. Semele bicolor C. B. Adams, i entire, 2 valves. 



(Dall identified.) 



176. Semele flavescens Gould. 10 valves. 



177. Semele venusta A. Adams. 2 entire shells. 



178. Spondylus calcifer Carpenter. Living, very 



massive. 



179. Spondylus limbatus Sowerby. 7 living. All 



spondyli are used as food. 



180. Spondylus princeps Broderip. Living. 



181. Strigilla carnaria Linne. Valves, common on 



beach. 



182. Strigilla lenticula Philippi. San Jose del 



Cabo. 



183. Tellina interrupta Wood. Several whole shells 



and valves. 



184. Tellina pura Gould. 6 valves. 



185. Tellina purpurea Broderip. i valve^ San Jose 



del Cabo. 



186. Terebra luctuosa Hinds, i, San Jose del Cabo. 



187. TivELA RADiATA Sowcrby. Several good speci- 



mens. 



