328 NOTE ON LAND AND FRESH WATER SHELLS. 
restricted, however, to the species existing in my own immediate 
neighbourhood, and a few collected at Paris, C. W. | 
I intend here to confine myself to the shells found in the vicinity 
of Toronto, viz. at Weston, Toronto Island, and Todmorden on the 
River Don. 
I must not omit the expression of grateful acknowledgment to the 
Rev. Professor Hincks, for his valuable aid in their determination. 
The shells consists of representatives of the two classes, Gas- 
TEROPODA and CONCHIFERA. 
In the class GasTERoPoDA, we find examples of the genera Helix, 
Planorbis, Succinea, Limnea, Paludina, Valvata, Melania and 
Physa, as shown in the following list of species. 
Genus Hetix,—1. H. albolabris (or white-lipped Helix). 2. H. 
alternata, these two varieties are very common. 3. H. monodon; 
4. H. tridentata; 5. H. ligera. I found this latter variety at 
Todmorden. Prof. Hincks was unaware of its being Canadian: his 
Specimens are from Ohio. 
Genus PLanorsis,—1l. P. trivolvis; 2. P. bicarinatus; 3. P. 
campanulatus ; all very common. : 
Genus Succinea,—S. vermeta ? (Say.)—I have found this shell 
only at Weston. 
Genus Limnawa,—l. L. stagnalis ; is very common on the Island, 
the only locality at which I have observed it*. 2. L. palustris=L. 
elodes (Say), common on the Island. 
Genus Patupina,—1l. P.impura; 2. P. porata (Say); this 
variety is known now by the name of Amnicola porata. All the 
small shells heretofore known as Paludinas are now referred to the 
genus Amnicola: both these shells are found on the Island. 
Genus Vatvata.—l. V. tricarinata ; 2. V. piscinalis. 
Genus Mrnania. Melania.—Very common, Amunicola ( paludina) 
porata, classed with this genus under the sub-genus Amnicola: not 
very common. 
Genus Puyss,—l. P. heterostropha (Say); this variety closely 
resembles P. fontinalis of Europe: very common on the Island. 2. 
P. ancillaria (Say) also very common. 
A few more species, one of which resembles vertigo pygmea of 
Europe, can be obtained at the above mentioned localities. 
* Since writing this, Dr. Bovell informs me that he has found L. stagnalis in the River 
Humber. 
