Royal Physical Society. 



179 



allowed, and while slugs or worms could be procured, 

 sloughed ten times, and in the following year nine times ; and 

 this seems, from a large average, to he a common result. In 

 three years, one young animal sloughed thirty-four times, and 

 another thirty times. In the first year of rapid growth, one 

 sloughed thirteen, and other three twelve times. 



The following table gives the exact dates of sloughing of 

 four specimens hatched 3d September 1845, which were easily 

 distinguished, and known by the names heading the table : — 



Sloughs. 



Spotty. 



Spotless. 



Spot. 



Mag. 



Sloughs. 





1845. 



1845. 



1845. 



1845. 





1 



October 13 



October 13 



October 15 



October 11 



1 



2 



November 4 



November 5 



Novemberl3 



October 28 



2 



3 



December 9 



December 13 



December 14 



December 7 



3 





1846. 



1846. 



1846. 



1846. 





4 



January 29 



February 1 



February 4 



January 24 



4 



5 



February 20 



February 25 



February 24 



February 14 



5 



6 



March 14 



March 16 



March 26 



March 6 



6 



7 



April 5 



April 11 



April 19 



March 30 



7 



8 



May 4 



May 6 



May 9 



April 25 



8 



9 



May 28 



May 30 



June 1 



May 11 



9 



10 



June 25 



July 1 



July 2 



June 12 



10 



11 



July 23 



July 26 



July 28 



July 9 



11 



12 



August 13 



August 19 



August 26 



August 1 



12 



13 



Septemberl4 



September27 



September27 



September 3 



13 



14 



October 16 



November 8 



1847. 

 February 24 



October 30 



September22 



14 



15 



November 4 



November 23 



October 14 



15 









1847. 



1847. 





16 



December 21 



1847. 

 January 24 



March 27 



January 5 



January 14 



16 



17 



April 23 



February 1 



February 23 



1 



18 



February 27 



May 15 



March 1 



March 25 



18 



19 











19 



20 



April 15 



July 25 



May 15 





20 



21 



May 26 



October 3 



August 16 





21 



22 



June 21 



October 27 







22 



23 



July 26 



November 19 







23 



24 



Septemberl3 



December 15 

 1848. 







24 



25 



October 28 



February 9 







25 



26 



November 2 4 



1848. 



March 5 







26 



27 



January 9 



April 1 







27 



28 



February 2 



April 28 



' 





28 



29 



April 10 



May 1 







29 



30 



May 22 



September 7 







30 



31 



June 22 









31 



32 



July 19 









32 



33 



August 13 









33 



34 



September 14 









34 



