418 EXPLANATION OF PLATES. 
FIGURE. 
86. Fluminicola Nuttalliana, Lea. Oregon, 
88. Cochliopa Rowellii, Tryon. California, 
. Lacunopsis Jullieni, Desh. Cambodia, 
90,91. Lacunopsis (Spekia) zonata, Woodw. LL. Tan- 
Ce CO 1 S 
ganyika, Africa, . 
. Pomatiopsis lapidaria, Say. Pennsylvania, 
. Assiminea Grayana, Leach. Europe, 
. Assiminea (Paludinella) littorea, Chiaje. Europe, 
. Assiminea (Acmella) tersa, Benson. India, ! f 
. Assiminea (Hydrocena) Cattaroensis, Pf. Dalmatia, 3 
. Valvata pisecinalis, Muller. Europe, 
. Valvata (Girorbis) cristata, Muller. Europe, 
99. Valvata (Tropidina) tricar inata, Say. U. States, . 
Valvata (Lyogyrus) pupoidea, Gould. Massachusetts, 
. Toxosoma eborea, Conr. Tert., So. America, 
. Liosoma eurta, @onralle Tert., ‘So. America, 
. Bithynella (Micropy reus) minutulus, Meek. Laramie, 
Dakotah, 
. Bucehilus Deschiensianum, Sandberger, 
. Velainella columnaris, Masseur: Eocene, France, 
PLATE 74. 
Paludina Bengalensis, Lam. India, 
. Paludina (Melantho) integra, Say. U. States, 
. Paludina (Tulotoma) bimonilifera, Lea. Alabama, 
. Paludina (Margarya) Melanoides, Nevill. L. Tali, 
Yunnan, 
. Paludina (Neothauma) ‘anganyicense, BE. A. Smith. 
L. Tanganyika, Africa, 
. Paludina (Tanganyicia) rufofilosa, BE. A. Smith. L. 
Tanganyika, 
. Paludina ‘(Mekongia) Jullieni, Dest! Cambodia, 
. Cleopatra bulimoides, Olivier. Egypt, 
. Lioplax subcarinata, Say. Delaware River, 
. Ampullaria ampullacea, Linn. Borneo, i 
. Ampullaria (Pomus) canaliculata, Lam, Florida, 
. Ampullaria (Pomella) neritoides, d’Orb. Uruguay, 
. Asolene Platz, d’Orb. Buenos Ayres, : : 
. Lanistes Bolteniana, Chemn. Nile, 
. Meladomus olivacea, Sowb. W. Africa, 
. Marisa cornu-arietis, Linn. Rio Parana, 
. Marisa Chiquitensis, d’Orb. Bolivia, 
PuatTeE 75. 
. Truncatella truncatula, Drap. Europe, 
. Geomelania Jamaicensis, Pfr. Jamaica, 
