148 
2135 Dosinia (Dosinidia ) Dunkeri Philippi. 1844. 
Magdalena bay, Baja Gal.—Head of Gulf of Cal.—Santa 
Elena, Colombia. 
2136 Dosinia (Dosinidia) Anne Cpr. 1857. 
Gulf of Cal.— Mazatlan, Sin. 
2137 Clementia solida Dall. 1902. 
Topolobampo, Sin., Mexico. 
2138 Transennella tantilla Gould. 1853. | 
Sitka, Alaska.—Todos Santos bay, Lower Cal. 
Pleistocene of Santa Barbara, Cal. 
2139 Tivela planulata Spy. 1829. 
Gulf of Cal.—Ecuador. 
2140 Tivella hians Phil. 1851. | 
Magdalena bay, Baja Cal.—vValparaiso, Chili. 
2141 Tivela arguta Roemer. 1864. 
Gulf of Cal.—Panama. | 
2142 Tivela Byronensis Gray. 1838. 
Scammon’s Lagoon, Lower Cal.—Ecuador. 
2143 Tivela Delesserti Deshayes. 1854. a 
Scammon’s Lagoon, Baja Cal.—Acapulco, Mexico. 
2144 Tivela stultorum Mawe. 
Synonymy:—Pachydesma crassatelloidés, etc. 
2145 Macrocallista squalida Sowerby. 1835. 
Cerros Island, Baja Cal.—Peru. 
2146 Macrocallista aurantiaca Sby. 1831. 
Gulf of Cal.—Peru. 
3147 Macrocallista pannosa Sby. 1835. 
Gulf of Cal.—vValparaiso, Chile. 
2148 Macrocallista puella Cpr. 1864. 
Gulf of Cal. to Acaptlco, Mexico. 
2149 Callocardia (Agriopoma) Catharia Dall. 1902. 
Ballenas bay, Baja Cal.— Gulf of Cal.—Panama. 
2150 Pitaria Newcombiana Gabb. 1865. ; 
Monterey, Cal., to Clarion Island, and the Gulf of Cal., in 15- 
31 fms. 
Thin and delicate, with zigzag brown markings and a papery 
periostracum when fresh. 
2151. +~Pitaria unicolor Sby. 1835. 
Humboldt bay, Cal.—Panama, 
2153. +«Pitaria vulnerata Brod. 1835. 
Magdalena bay, Lower Cal.—Panama. 
2154 Pitaria lupanaria Lesson. 1832. 
Ballenas bay, Baja Cal.—Payta, Peru. 
2155 Pitaria rosea Brod. & Sby. 1829. 
Gulf of Cal. to Panama. 
2156 P: (Lamelliconcha) concinna Sby. 1835. 
Magdalena bay, Lower Cal._Hcuador.—Peru. 
2157 P: circinata alternata Brod. 1835. 
2158 Cytherea (Ventricola) Fordi 
Santa Barbara Islands, Cal.—Panama. 
See description under Venus Fordi; Dall says it is quite dis- 
tinct from Venus toreuma of the Polynesian Islands, 
2159 Cytherea (Ventricola) Magdalenze Dall. 1902. 
Off Magdalena bay, Baja Cal.—Panama bay, in 18 fms. 
2160 Cytherea (Ventricola) rigida Dillwyn. 1817. 
Gulf of Cal.—West Indies. ; 
Synonymy:—Venus isocardia Verrill (187 0); fet 'v, rigida 
Gid. 1850. 
2161 Cytherea multicostata Sby. 1835. 
Gulf of Cal.—Panama.—Galapagos Islands. 
Es 
