Sludics on marine Cstracods 



125 



The increase per cent in the growth of larvae is recorded in table 34. Sixty-six molts 

 belonging to more than half as many individuals are tabulated. The average increase per 

 cent in length in stages 2 to 10 varied from 11 to 15,84. The average for stages is 13,67; 

 for indi^^duals, 13,89. These facts seem to warrant the conclusion that the increase percentage 

 in the young is very similar to that of the adult, a result of considerable interest. The 

 average length of the yoimg lobster during its first ten molts is given in the following table. 

 The data are taken partly from table 34: 



Table 25. — Actual length of lobsters during the first ten molts. 



Number of 

 molt or stage 



Average lengtli. 

 mm. 



Extremes in lenglli. 

 mm. 



.Niimljer of lobsters 

 examined. 



1 

 2 

 3 

 4 



5 

 6 



7 



8 



9 



10 



7,84 

 9,20 

 11,1 « 

 12,6 

 14,2 

 16,1 

 18,6 

 21,03 

 24,5 

 28,03 



15 



47 



79 



64 



15 



12 



4 



5 



2 



3 



The rate of growth expressed by the average of lengths in the second column of table 25 

 implies an increase per cent of about 15,3 instead of 13,67 (the average increase in stages recorded 

 in table 34). Assuming the average length of the first larva to be 7,84 (the average of 15 individuals, 

 table 25), and allowing the increase in length at each molt to be 15,3 per cent of the length before 

 molting, we would have the following series of lengths attained during the first thirty stages. 



