of the Fishery Board for Scotland. 



85 



B. IOO4. Brood —Hatched in August 190J+. 



12. October 27th 1904.— Young lobster, first young stage, cast. 



„ November 3rd. — The soft lobster, second young stage, died ; l'cm. 



13. 31st October. — Young lobster cast. 



,, November 3rd. — Soft lobster died ; 2*r)cm. 



14. June 4th 1905. — One young lobster, the sole remaining, measuring 



l*9cm , cast. 



,, ,, 14th. — The young lobster died ; 2-lcm. 



Casting of zo&e occurred as late as October and November and of 

 megalops and later stages in October, November, May, and June. 



Length of Different Stages. 



The iast zoea stage lasted, in the case of No. 2, from October 1st to 

 November 7th, a period of five weeks. 



The megalops stage lasted, in the case of two examples in No. 1, from 

 September 30th to October 30th and November Gth, i.e. four and five 

 weeks respectively. 



Appellof records that two lobsters in the same jar differed from one 

 another by a month in arriving at the sixth stage. Casting took place 

 also in winter. 



Sizes of the young lobsters which died, and their approximate ages (from 

 hatching) at death : — 







Length 



Number in 



Stage.* 



Age. 



in 



preceding 







Cms. 



List. 



M 



2 months 



1-G: 1-7 





M 



9 1 



^2 »> 



1-6 



2 



+ 2 



2 1 



^2 » 



1-7 



12 





01 



^2 » 



2-5 



13 



+ 2 



°2 W 



1-4 



5 



+ 2 



4 „ 



1-7 



6 



+ 1 



5 „ 



1-7 



7 



+ 1 



5 „ 



1-8 



8 



+ 2 



5 „ 



1-7 



9 



+ 3 





2-2 



11 





10 



21 



14 



+ 3 



10 



1-8 



10 



* The following contractions are used in this column: — "M," Megalops; " +1," 

 first young stage, i.e. stage immediately following Megalops; " +2," second young 

 stage, &c. 



[Table. 



