1917] The Oitawa Naturalist 41 



25. Gastrodonta intertexta (Binney). Port Rowan, September 

 2nd, 1915, a single mature specimen; St. William's, September 3rd, a 

 few living specimens and numerous shells in good condition on a steep 

 wooded slope. It was associated here with considerable numbers of 

 Polygyra thyroides, P. fraudulenta and Pyramidula alternata. 



Gastrodonta ligera (Say) has been recorded from Toronto, but 

 I have not seen specimens of it. 



LlMACIDAE. 



26. Agriolimax agrestis (Linn.) This slug is very abundant at 

 Toronto, De Grassi Point, Port Rowan and St. William's and doubt- 

 less everywhere in the cultivated parts of Ontario. During the summer 

 only immature specimens were seen at De Grassi Point and they had 

 scarcely reached their full size when I left on September 23rd. Adults 

 are plentiful at Toronto in the fall and may be found in abundance 

 until well into November. They are most plentiful in low, grassy 

 places. 



27. Agriolimax campestris (Say). Toronto, De Grassi Point, 

 Port Rowan, St. William's. Abundant and generally distributed, 

 occurring with the preceding species and also in woods. 



At De Grassi Point these two slugs are particularly numerous 

 about the narrow belt of woods' along the shore where Vitrina limpida 

 occurred (vide antea). The individuals seen during the summer were 

 mostly immature. Adults are common in the fall until November. 



28. Limax maximus Linn. A single specimen of this large 

 European slug was found at Toronto by Mr. H. T. White, in 1910. 



Arionidae. 



29. Arion circumscriptus Johnston. This is also a European 

 slug though it has become thoroughly naturalized in the neighbourhood 

 of Toronto, occurring in almost every little patch of woods under logs 

 and rubbish. It is common from spring to autumn. 



Endodontidae. 



30. Pyramidula alternata (Say). This is by far the commonest 

 of, our larger snails and persists longer than most species in small 

 patches of woods and thickets in the environs of the city. Toronto, De 

 Grassi Point, generally distributed in woods. Also found at Go Home 

 Bay, Giant's Tomb Island, Port Rowan and St. William's. 



31. Pyramidida cronkhitei anthonyi Pilsbry. One of our most 

 abundant species, occurring very generally in low woods at De Grassi 

 Point. Also found at Toronto, Go Home Bay, Giant's Tomb Island 

 and St. William's, April-October. 



