Inachus ? 



22 

 21 

 20 

 19 

 18 

 17 

 16 

 15 

 14 

 13 

 12 

 II 

 10 



- T T 



T T 



T T . 



T T 



35 40 45 50 55 60 65 70 75 80°/ 

 -40-45-50-55 -60-65-70-75-80-85 /t> 



1 2 3 4 5 6 7 8 9 10 II 12 13 14 15 16 



Fig. 39. — Dimor- 

 phism due to moult- 

 ing in (A) female 

 abdomen (breadth 

 of 6th segment) 

 and (B) male chela 

 (breadth of propus) 

 in the spider-crab, 

 Inachus dorsetten- 

 sis. 



The values are relative, 

 expressed as percentages 

 of carapace length. The 

 frequencies for each value 

 of abdomen and chela 

 are given for various 

 values of carapace length, 

 and also for all specimens 

 taken_together. 



