39 



425 Nassa mendica Gould. 

 Sitaka to San Diego, California. 



426 Bittium fllosum Gould. 



Sitaka, Alaska, to Monterey, Cal. Santa Rosa Island (Yates). 



427 Variety Esuriens Carpenter. 

 Santa Barbara (Yates). 

 Synonym of B. esuriens. 



428 Bittium asperum Gabb. 



Santa Barbara, Cal., to Lower California. Santa Rosa Island 

 (Yates). 



429 Lacuna solidula Loven. 



Circumboreal — Norway — Alaska to San Pedro, California. 



430 Isapis obtusa Carpenter. 



San Diego, Cal. Santa Barbara, at 20 fathoms (Cooper). 

 Vancouver Island (G. W. Taylor). See Nautilus 24:112, On 

 Tapes staminea. 



431 Amphithalamus inclusus Carpenter. 

 Santa Barbara to San Diego, California. 



432 Mitromorpha aspera Carpenter. 

 Monterey to Santa Barbara, California. 



433 Crepidula aculeata Gmelin. 



North Carolina to South America — Monterey, Cal., to Chili — 

 Asia — Africa? 



434 Hipponyx serratus Carpenter. 



Monterey to Gulf of California. Santa Barbara, northern 

 limit (Yates). 



Synonym of Amalthea serrata. 



435 Hipponyx antiquatus Linne. 



All tropical and warm seas. Monterey, Cal., to Todos Santos 

 bay, Baja Cal. 



Synonym of Amalthea antiquata. 



436 Hipponyx cranioides Conrad. 

 Synonym of Amalthea cranioides. 

 Santa Rosa Island (Yates). 



437 Spiroglyphus lituella Morch. 

 Monterey to Cape St. Lucas. 



438 Caecum crebricinctum Carpenter. 



Monterey to San Diego, Cal. Santa Barbara, 20 fathoms 

 (Cooper). 



439 Turritella cooperi Carpenter. 

 Santa Barbara to San Diego, Cal. 



440 Volvnla cylindrica Carpenter. 

 Santa Barbara to San Pedro, Cal. 



441 Dendronotus iris J. G. Cooper. 



Santa Barbara, Cal., in the channel on kelp (Yates). 



