WEST AMERICAN SHELLS 
A, levettei, Bland, Nautilus XVI, p. 59. 
A. thomsoniana, Ancey, Nautilus XV, p. 109. 
var. porterae, Pils. & Ckll, Nautilus XII, 
p. 49. 
var. cooperae, Cockerell, Nautilus XV, p. 
305) OVE, piaG- 
Genus, sonorena, Pilsbry 
S. hachitana, Dall, Pro. Phila. Acad. Sei., 
1900, p. 557. 
S. rowelli, Pilsbry, Pro. Phila. Acad. Sci., 
1902; p. 511. 
S. granulatissima, Pilsbry, Pro. Phila. Acad. 
Sez, 19025 po: ole 
S. walcottiana, Bartsch, Nautilus XVII, p. 
12. 
Genus, vitrea, Fitz 
V.johnsoni, Dall, Nautilus IX, p. 27. 
V. hammonis, Strom, Nautilus XITI, p. 64. 
V. pugetensis, Dall, Nautilus IX, p. 27. 
V. indentata, Say, Pro. Phila. Acad. Sci., 
1902, p. 511. 
var. umbilicata, Ckll., Nautilus XVI, p. 58. 
V. subrupicola, Dall, U. S. N. M. XIX, p: 
366. 
Genus, oreonetix, Pilsbry 
O. cronkhitei, Newcomb, U. S. N. M. XIX, 
p. 366; Nautilus XVII, p. 131. 
O. striatella, Anthony, Nautilus XIII, p. 64. 
O. elrodi, Pilsbry, Nautilus XVI, p. 62; XVI, 
Dey 
O. cockerelli, Pils., Nautilus XII, p. 85. 
