ae OP tag Ph vb a? Sg 
Dp ye Set te ee a 
ae ve 4 Ris 
Limnea desidiosa, 259, 261, 265, 266| Limnzea s¢rigosa, 260. ; 
267, 268, 270, 273. subfusca, 283. 7 
distorta, 283. succiniformis, 260. 
distortus, 277. suffiatus, oe . 
elodes, 273. SUPE: ; 
elongatus, 277. turgida, 288. 
emarginata, 257, 260, 265. umbilicata, 272, 273, 
or0sa, 283 umbrosa, 273. 
pb sei 68 vivipara, 304. 
exilis, 282, walkeri, 287. 
exnaneu, 277, 923. woodruffi, 259, 264, 265. 
ferrissi, 259, 277. LIMNAI sebra, 218, 21%. 
fragilis, 273, 283. FT itnob hve 6 
fusiformis, 267. pata 2a: Aber 
gibbosa, 283. ocalities of special interest, 13. 
grifithiana, 268. Macrocyclis, 171. 
holbollii, 277. Margaritana calceola, 63, 64. A 
humilis, 259, 268, 269, 273. hatherina, 60. ig 
tllagueata, 283. Melampus, 256. 
intertexta, 263. Melania correcta, 325. 
Jamesit, 265. cuspidata, 325, 
jolietensis, 280, 281. elongata, 323. 
jugularis, 283. napella, 325. 
kirtlandiana, 287. niagarensis, 325. 
paaeengen 7. vein Hae ; > 
econii2, a tracta, : 
linsleyz, 268. Melantho, 356. 
lutea, 283. Melantho geniculum, 359. 
major, 283. Melantho gibba, 358. , 
mean 283. P ste S Ag 359, + 
michiganensis, 276. nolant, 306. 
mighelsi, 257, 366, 265. MENETUS, 296. ‘i 
minima, 283. Mesodon, 140. 
modicella, 265. Mesomphix, 175. 
navicula, 260. METAPTERA, 97. 
nuttalliana, 276. Monostoma lucanica, 299, ; 
obrussa, 267. MONOTREMATA, 740. ; 
occidentalis, 283. iz 
palustris, 139, 259, 263, 269,| NAIADACEA, 40. 
273, 275-280, 285. Neohelizx, 140. a 
parva, 268. . OBLIOU 88 
pellucida, 260. ‘Hier cepiieny de 
‘thiladelphica, 265. Obliquaria pense: 66 eae $9, 90. 
pinguis, 263, 267, 265. OMPHA 2 aie : 
planulata, 265. mae a etl wey 176 H 
plebeia, 23. mphalina cuprea, m 
dlica, 265. Sy Sit 175, 776, 178. 
polita, 176. 
Sain tee ORTHURETHRA, 225. 
guadrangulata, 283. Paludina, 356. 
bes 8 257, 259, 275, 277,| Paludina ee 359. 
-288. extlis, 361. 
renee 288. MoE are 359, : 
rosea, 283. ustrica, 344, ; 
roses 283. pore es 
rustica, 265. obtusa, 336, 337. 
sanctemarie, 283. pallida, 340, c 
scalaris, ak 281, 288. regularis, 306. ¢ 
sericata, 263. vivipara, 352. isd © 
sinistrosa, 283, Palubesrerke 337- er 
* speciosa, 288. Paludestrina nickliniana, 337, 738, 339, o2 
stagnalis, 259, 279, 284, 285. thermalis, 338. a 
