WEST AMERICAN SHELLS 
T. albus, L., Arctic to Shumagin Is. 
T. dentiens, Gld., Puget Sound; San Diego. 
T. gothicus, Cpr., Catalina Is. 
T. flectens, Cpr., Puget Sound. 
T. lividus, Midd., Sitka. 
T. scrobiculatus, Midd., ‘‘California.’’ 
T. ruber, L., Arctic to Sitka. 
T. (Trachyradsia) aleuticus,Dall, Aleutian 
Is. 
T. (Cyanoplax) hartwegi, Cpr., Vancouver 
Is. to Magdalena Bay. 
var. nuttallr, Cpr. 
T. raymondi, Pils., Puget Sound to Mon- 
terey. 
Genus, Chaetopleura, Shuttleworth 
C. gemmea, Cpr., Monterey. 
C. livida, Sby., West British Columbia. 
var. parallela, Cpr., to Cape St. Lucas. 
var. prasinata, Cpr., to Cape St. Lucas. 
Genus, paltochiton, Dall 
P. lanuginosus, Cpr., San Diego southward. 
Genus, Ischnochiton, Gray 
I. fallax, Cpr., Monterey. 
I. magdalenensis, Hds., Monterey south- 
ward. 
I. conspicuus, Cpr., Santa Barbara south- 
ward. 
var. solidus, Cpr., Carpinteria, ete. 
I. interstinctus, Gld., Sitka to Monterey; 
S.2b5 dis: 
I. newcombi, Cpr., Catalina Is. 
