236 SCOTT : CONCHOLOGICAL NOTES. 



ing two, or at most three days at which time the log was last' 

 examined. There were seven eggs in one, eleven in another, 

 and sixteen in the third cluster. They were almost transparent, 

 pale whitish in colour, and of large size, measuring from 6|- x 5 

 to 8 X 5! mill. Though we are not certain that these three 

 clusters were deposited by separate individuals, yet taking 

 into account the size of the eggs, and that the under side of 

 the log referred to was frequented by eight, ten, and some- 

 times thirteen individuals of L. flavus at one time, it is quite 

 probable that the three clusters were deposited by different 

 molluscs. Between the 28th and 29th October, the embryo 

 slugs began to break through their prison, and lead a free and 

 independent existence, so that from the time the eggs were 

 laid till the young limaces were hatched, at least forty-five or 

 forty, six days elapsed. From the time the eggs were observed 

 till the young were hatched, frequent and regular observations 

 were made as to temperature, state of the weather, &c. These 

 showed a minimum temperature of 8° cent., maximum 15° cent., 

 and an average of about 12° cent. (^53-6°F), and wet or showery 

 days averaged fully 20%. 



Among the adult L. flavus noticed by my son, was one of 

 a much lighter colour than the others, this Mr. Denison 

 Roebuck identified as var s^risea. 



H. arbustorum — Shell growth. 



On the 24th of April last my son and I were taking a walk 

 in the vicinity of Greenock, when he happened to observe a 

 specimen of JI. arbustorum, v. flavescens. On examining the 

 specimen it seemed as if it had just begun to make an addition 

 to its shell. We took it home and fed it on bits of cabbage 

 leaves, turnips, &c., keeping it about the kitchen window, and 

 allowing it as much freedom as possible. After feeding on the 

 cabbage, &c., awhile, it would make its way direct as if it knew 

 the road, and locate itself under the water-tap, where every now 

 and again it would be subjected to a douche, which it seemed to 



J.C, v., Oct., 1887. 



