THE 
fuliginosus Griff. 
intertextus Binn. 
exiguus Stimp. 
arboreus Say. 
indentatus Say. 
limatulus Ward. 
nitidus Mull. 
viridulus Say. 
fulvus Drap. 
minusculus Binn. 
petrophilus Bland? 
Strobila labyrinthica Say. 
Helicodiscus lineatus “ 
Vallonia pulchella Mull. 
Punctum pygmaeum Drap. 
Pupa contracta Say. 
pentodon es 
corticaria 
fallax oe 
armifera ss 
curvidens Gld. 
Vertigo ovata Say. 
milium Gld. 
tridentata Wolf. 
bollesiana Morse. 
gouldii Binn. 
Carychium exiguum Say. 
Valvata sincera Say. 
tricarinata es 
Amnicola porata Say. 
cincinnatiensis Anth. 
Sayana rs 
Pomatiopsis lapidaria Say. 
Bythinella attenuata Hald. 
Melantho integra Say. 
Bulimus dealbatus Say. 
Ancylus rivularis Say. 
Limnaea reflexa Say. 
palustris Mull. 
desidiosa Say. 
humilis; .“ 
NAUTILUS. 69 
catascopium Say. 
caperata a 
Physa gyrina Say. 
heterostropha Say. 
Bulinus hypnorum L. 
Planorbis trivolvis Say. 
iy var fallax: 
bicarinatus Say. 
companulatus Say. 
parvus 
Segmentina armigera Say. 
Succinea obliqua Say. 
ovalis Gould. 
avara Say. 
“var. vermeta. 
Sphaerium sulecatum Lam. 
solidulum Prime. 
occidentale “ 
striatinum Lam. 
truncatum Lins. 
Pisidium abditum Hald. 
Unio rubiginosus Lea. 
occidens sf 
luteolus Lam. 
sub-ovatus Lea. 
gibbosus Bar. 
pressus Lea. 
eracillis Barr. 
phaseolus Hild. 
glans Lea. 
radiatus Lam. 
cocineuus Hild. 
spatulatus Lea. 
nigerrimus “ 
ligamentinus Lam. 
plicatus Les. 
undulatus Bar. 
nov-eboraci Lea. 
Margaratana marginata Say. 
ealceola Lea. 
deltoidea ‘ 
