WEST AMERICAN SHELES 
L. palustris, Muller, Nautilus V, p. 56; XII, 
pe L110; 
var. proxima, Lea, Nautilus V, p. 56. 
var. nuttiliana, Lea, Nautilus X VII, p. 84. 
var. rowellu, Tryon, Nautilus V, p. 56. 
var. umbrosa, Say, Nautilus V, p. 56. 
var. trasku, Tryon, Nautilus V, p. 56. 
L. leptda, Gould, U.S. N. M. XIV, p. 102. 
L. adelinae, Tryon, U.S. N. M. XIV, p. 102. 
L. tryon, Lea, Nautilus IX, p. 102. 
L. bombycina, Lunge, Nautilus V, p. 56. 
L. humilis, Say, Nautilus XIII, p. 65. 
var. ferruginea, Hald, Nautilus V, p. 56. 
L. emarginata, var. montana, Elrod, Nauti- 
itis REV, 3 dale 
L. kirtlandiana, Lea, Figure 130. 
L. obrussa, Say, Nautilus V, p. 56. 
L. pilsbryi, Hemphill, Nautilus IV, p. 25. 
Genus, raaix, Montfort 
R. ampla, var. utahensis, Call, Bull. U. S. 
Geol. Sur. XI, p. 47. 
Genus, Limnophysa, Witz 
L. bulimoides, Lea, Bull. U.S. Geol. Sur. XT, 
pads: 
L. caperata, Say, Figure 129. 
L. catascopium, Say, 8. I. Mis. Coll. No. 143, 
[os Oe 
Genus, pnysa, Draparnaud 
P. heterostropha, Say, Nautilus VI, p. 20; 
XV 5p. de. 
P. mexicana, Phil., U.S. N. M. XIX, p. 368. 
