OF WEST COAST MOLLUSCA. 
392 Ancylus crassus /ald. 
“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, Cal. 
395 Ancylus fragilis Tryon. 
Laguna Honda, near San Francisco. 
396 Ancylus subrotundatus Tryon. 
Umpqua River, Oregon. 
397 Ancylus Nuttallii Wald. 
“Oregon.” (Nuttall coll. 1834.) 
398 Gundlachia Californica Rowl. 
Feather River, Cal., near mouth. 
399 Siphonaria thersites Cpr. 
Necah Bay; Str. Fuca, W. T. 
400 Ianthina globosa Sw.? 
S. Diego to Cape St. Lucas—Atlantic. 
401 Dentalium pretiosum Nuit. 
“ California,” (Nuttall.) Mexico ? 
402 Dentalium Indianorum Cpr. 
Str. Fuca to Santa Barbara. Ww ante - 
403 Dentalium rectius Cpr. 
Str. Fuca. 
404 Dentalium semipolitum Br. and Shy. 
San Diego to Gulf of California. 
405 Dentalium hexagonum Sdy. 
Santa Barbara to Mexico—* E. Indies, China.” 
406 Crypochiton Stelleri Midd. , , 
Str. Fuca to Monterey—Kamtschatka. (tu - Shovneqgers, Cabobura anrt San Wn quel Ide 
407 Katherina tunicata Wood. 
: Str. Fuca to Monterey—Sitka. Cotes met - Unalashka - Ua - 
408 Tonicia lineata Wood. 
Str. Fuca to Monterey—Sitka; Kamtschatka. 
409 Tonicia submarmorea Midd. 
Str. Fuca to Oregon—Kamtschatka. 
410 Mopalia muscosa (id. 
Str. Fuca to San Diego. 
411 Mopalia Wossnessenskii Midd. 
Str. Fuca to Santa Cruz—Sitka. 
412 Mopalia Kennerleyi Cpr. 
Str. Fuca, W. T. 
7/, 418 Mopalia Kennerleyivar? Swannii Cpr. 
Neeah Bay, W. T. 
4 
