149 



2162 Sax idem us giganteus 



Synonymy: — Venerupis gigantea Deshayes. 1839. — Saxido- 

 mus squalidus of authors (not Deshayes — a South American). — ■ 

 S: Nuttallii of some lists — not Conrad. 



2163 Cyclinella subquadrata Hani. 1845. 



Gulf of Cal., in 7-25 fms. — St. Elena, Colombia. 



2164 Cyclinella Kroyeri Phil. 1847. 



Gulf of Cal., in 14-26 fms. — Chile. — Peru. 



2165 Cyclinella Singleyi Dall. 1902. 

 Guaymas, Sonora, Mexico. 



2166 Chione compta Brod. 1835. 

 Gulf of Cal., in 21-26 fms. — Peru. 



2167 Chione purpurissata Dall. 1902. 

 Gulf of Cal. — Cape San Lucas. 



2168 Chione pulicaria Brod. 1835. 

 Gulf of Cal. — Chiriqui, Colombia. 



2169 Chione amathusia Phil. 1844. 

 Gulf of Cal. — Panama. 



2170 Chione (Lirophora) Kellettii Hds. 1844. 

 Gulf of California. — Panama. 



2171 Chione (Lirophora) Marise Orb. 1847. 

 Gulf of Cal. — Guayaquil. 



2172 Chione (Timoclea) asperrima Sby. 1835. 

 Gulf of Cal., at La Paz. — Payta, Peru. 



2137 Marcia Kennerleyi Rve. 1864. 



Kadiak Island, Alaska. — Monterey, Cal., in 8-18 fms. 



2174 Marcia (Venerella) subdiaphana 

 Synonymy: — Clementia subdiaphana Cpr. 1865. 



Unimak Pass, Alaska. — Catalina Island and San Pedro bay, 

 Cal. (see Mrs. Burton Williamson, Nautilus 6:116). 



2175 Paphia grata 



Turtle bay, Baja Cal. — Panama. 



Synonymy: — Venus discors, tricolor, fuscolineata, and histri- 

 onica of Sby. (1835). — V: muscaria Reeve, 1863, — etc. 



2176 Paphia staminea 



Japan. — Alaska. — Cape San Lucas. — Socorro Island. 



"The typical form is elegantly radially ribbed with fine even 

 riblets, the concentric sculpture inconspicuous, the color yellowish 

 white with pale purplish brown modulations. This has been col- 

 lected at Crescent City, Cal., and southward to the limits of its 

 range, though the species is not abundant anywhere south of Mon- 

 terey, Cal." — Dall. 



Synonymy (of typical form): — Venus mundulus Reeve, 1863. 

 — V: dispar and ampliata Gld. ex Cpr. 1857. — Chione straminea 

 Desh. (non Sby.). 



2177 Variety petiti Desh. 1839. 



Synonymy: — Tapes diversa Sby. — Venus rigida Gld. 



The form especially abundant north of the Columbia river. 

 Larger than the southern variety, of a yellowish, chalky white, or 

 dull gray, without maculations; and the separation of the sculp- 

 ture into areas is often well marked. San Diego, Cal. — Todos 

 Santos bay, Baja Cal. 



2178 Variety laciniata Cpr. 1864. 

 Monterey, Cal. — Todos Santos bay, Baja Cal. 



This extremely elegant variety is evenly reticulated by concen- 

 tric and radial sculpture, and derives its individuality from the 

 development of small prickles or spines at each intersection. 



