222 



Europe, also one of tlie most widely distributed. West of Billings' 

 bridge it is not rare, bub on account of its extreme minuteness is very 

 hard to find. I have also obtained it in Hull, but on either side of the 

 Ottawa it occurs only in moist, but not wet, places, in hardwood groves. 

 The greater diametar of the largest shell found here is 11 mm., height 

 G mm. 



Yitrina limpuht, Gould. — Large numbers of this beautiful shell 

 assemble together in the fall, and continuing together during the 

 winter and for some time in the spring, then disperse. Late in 

 October, 18SI, it was particularly abundant under wet leaves and 

 grass in the upper end of the Hull beaver meadow. As might 

 be inferred from its nortliern range, it is very hardy, being excelled 

 in this respect not even by the limaces. On ISovember 16th, 

 1S84, I noted great numbers in Brigham's pasture, Hull, under 

 cedar logs in light, sandy loam. Although the ground was covered 

 with snow and frozen for some distance on each side, under the 

 logs the shells were all moving about among numerous clusters of 

 eggs apparently not long deposited, and numbeiing from eight to 

 twenty-three, in each cluster that 1 counted. The large clusters 

 seemed too bulky to be the produce of a single individual, but as the 

 eggs are not fully inflated when in the body of the animal they then 

 require much less space tln,n that which they occupy when deposited. The 

 eggs, less oparpie than those of the helices, and less transparent than 

 those of the limaces, measure 1-4 by 1-1 mm. The shell itself has 

 usually a greater diameter of G mm., but often reaches 7 mm. Shells 

 from Hull much exceed in size those found on the Ontaiio side of the 

 Ottawa. The whole internal economy of this species may be viewed 

 through its transparent shell. The heart of one specimen was observed 

 to beat 130 times a minute. 



Lima.!- ac/restls, L. — The presence of this mollusk here could scarcely 

 liave ))assed unnoticed by Mr. Heron, who recorded many very rare 

 species. For my own part, I did not find it until 1882, when I met 

 with a single specimen within the city limits. In the same localiLy, in 

 the following year and since, it has been very ab.indant. It is an im- 

 ported species, its advent here, I am icclined to think, being quite 

 recent. It is marvellously- jjrolific: the eggs observed under a strip of 

 board hist October literally covered the ground. They are pellucid, 



