SCOTT : CONCHOLOGICAL NOTES. 229 



embryo shells occupied nearly the whole interior of the egg. 

 The shells had fully one and a half whorls, and measured fully 

 four mill, in breadth, by three mill, in altitude, and were of 

 a pale cream colour. 



H, nemoralis. 



On June 17th I collected a few molluscs of this species, 

 and by the following morning one of them had deposited a 

 cluster of eggs in the bottle in which they were confined. Though 

 I kept them for some days longer, no more eggs were 

 deposited. There were sixteen eggs in the cluster, and the 

 outside skin, unlike that of the eggs of H. aspersa, was cal- 

 careous, hard, and brittle ; they were pure white, and measured 

 3 X 2J mill. In fact they looked very much like miniature 

 eggs of the domestic fowl. 



Arion ater and Limax agrestis. 



On the 22 nd of August I observed the nests of one Arion 

 ater and five Limax agrestis. That of Arion contained thirty- 

 six eggs, those of Limax twenty, twenty, twelve, seventeen, and 

 nineteen eggs respectively. They were not deposited in hollows 

 as were those of ^ aspersa, but were in clusters under stones. 

 They were of a pale blueish-white colour. Their outside coating 

 was a thin semi-transparent membrane. I find I have no 

 measurement of these. 



Limax flavus. 



I had no opportunity for watching the development of the 

 eggs in any of the preceding cases, but with regard to Z. flavus, 

 I am able, from a series of observations made by my son, 

 Andrew Scott, to give a few details bearing on this point. 



At a place in Greenock, where L. flavus is of frequent 

 occurrence, my son noticed on the 15th of September last year, 

 that three clusters of eggs had been deposited on the under side 

 of a log of wood. They had been deposited within the preced- 



