88 JOURNAL AND PROCEEDINGS 



FRESH-WATER GASTEROPODA. 



(operculate) 



Melantho decisus, Say. 



Hamilton Bay. Some very fine specimens from Dundas Marsh 

 on May 6th. 

 Pleurocera subsulare, Lea. 



Hamilton Bay. Not common. 



GONIOBASIS LIVESCENS. 



Hamilton Bay. 

 Valvata tricarinata, Say. 



Common in Hamilton Bay. 

 Valvata sincera, Say. 



Common in Hamilton Bay. 



Amnicola . 



I have at least three species of Amnicola from Hamilton Bay 

 not yet named. 



(non-operculate.) 



LlMNCEA PALUSTRIS, Mull. 



A very variable shell, common in all streams and the inlets of 

 Hamilton Bay. 



LlMNCEA CAPER ATA, Say. 



Taken in the same stream as Sphcerium occidentale. 



LlMNCEA HUMILIS, Say. 



From torrent in Chedoke Ravine, May 1 3th ; Dundas Ravine, 

 May 24th. 



Limncea stagnalis, Linn. 



Common in inlets of Hamilton Bay and in Dundas Marsh. 

 This species appears to be found in many different parts of 

 the world. 



LlMNCEA DESIDIOSA, Say. 



Taken abundantly in September at Isle D'Orleans, near 

 Quebec. 

 Limncea catascopium, Say. 



A single specimen was found in the same locality as the last. 

 Some specimens of Limncea taken in our district this season may 





