149 
2162 Saxidomus giganteus 
Synonymy:—vVenerupis gigantea Deshayes. 1839.—Saxido- 
mus squalidus of authors (not Deshayes—a South American). a 
S: Nuttallii of some lists—not Conrad. 
2163 Cyclinella subquadrata Hanl, 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) Marize 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 yariety is eyenly reticulated hy concen- 
tric and radial sculpture, and derives its individuality from the 
development of small prickles or spines at each intersection. 
