WEST AMERICAN “SHEEES 
E. coloradoensis, Stearns, U. S. N. M. XIX, 
p. 340. 
E. harpert, Bryant, Nautilus XIII, p. 148. 
E. arwonensis, Dall, U.S. N. M. XIX, p. 337. 
E. magdalenensis, Stearns, U.S. N. M. XIX, 
Daoau. 
E. arnherm, Dall, U.S. N. M. XIX, p. 375. 
Genus, Giyptostoma, Binney & Bland 
G. newberryanum, W. G. Binney, U. S. N. 
M. XIX, p. 376. 
var. depressum, Bryant, Nautilus XVI, p. 
70. 
Genus, Polygyra, Say 
P. armigera, Ancey, Nautilus V, p. 56. 
P. columbiana, Lea, Nautilus XII, p. 109. 
var. labiosa, Gould, Man. Conch. III, p. 
154. 
P. devia, Gould, Nautilus IX, p. 102. 
var. hemphilli, W. G. Binney, Nautilus 
XV. 129! 
var. clappi, Hemphill, Nautilus XT, p. 74. 
P. mearnsit, Dall, U.S. N. M. XIX, p. 3438. 
P. roperi, Pilsbry, Nautilus ITI, p. 14; XI, 
p. 59. 
P. loricata, Gould, Nautilus XIII, p. 64. 
P. tridontoides, Bland, Nautilus XIII, p. 84. 
P. mullani, Bland & Cooper, Man. Conch. 
IIT, p. 145. 
var. olneyae, Pilsbry, Nautilus V, p. 47. 
P. townsendiana, Lea, Nautilus XII, p. 24. 
var. ptychophora, A. D. Brown, Nautilus 
MVE ps 128: 
