OF WEST COAST MOLLUSCA 



392 Ancylus crassus Hold. 

 "Oregon." (Nuttall coll., 1834.) 



393 Ancylus caurinus W. Cp. 

 Black River, Puget's Sound, W. T. 



394 Ancylus patelloides Lea. 

 San Francisco to Santa Cruz, Gal. 



395 Ancylus fragilis Tryon. 

 Laguna Honda, near San Francisco. 



396 Ancylus subrotundatus Tryon. 

 Umpqua River, Oregon. 



397 Ancylus Nuttallii Hald. 



" Oregon." (Nuttall coll. 1834.) 



398 Gundlachia Californica Rowl. 

 Feather River, Cal., near mouth. 



399 Siphonaria thersites Cpr. 

 Neeah Bay ; Str. Fuca, \V. T. 



400 lanthina globosa Sw.? 



S. Diego to Cape St. Lucas Atlantic. 



401 Dentalium pretiosum Nutt. 

 " California," (Nuttall.) Mexico '( 



402 Dentalium Indianorum Cpr. 



Str. Fuca to Santa Barbara. 



403 Dentalium rectius Cpr. 

 Str. Fuca. 



404 Dentalium semipolitum Br. and Sl>y. 

 San Diego to Gulf of California. 



405 Dentalium hexagonum Sby. 



Santa Barbara to Mexico " E. Indies, China." 



406 Crypochiton Stelleri Mldd. 

 Str. Fuca to Monterey Kamtschatka. 



407 Katherina tunicata Wood. 

 Str. Fuca to Monterey Sitka. 



408 Tonicia lineata Wood. 



Str. Fuca to Monterey Sitka ; Kamtschatka. 



409 Tonicia submarmorea Midd. 

 Str. Fuca to Oregon Kamtschatka. 



410 Mopalia muscosa Old. 

 Str. Fuca to San Diego. 



411 Mopalia Wossnessenskii Midd. 

 Str. Fuca to Santa Cruz Sitka. 



412 Mopalia Kennerleyi Cpr. 

 Str. Fuca, W. T. 



413 Mopalia Kennerleyi rar?Swannii Cpr. 

 Neeah Bay, W. T. 



4 



