DISCOVERY REPORTS 



Z 



10 



LENGTH CLASSES 

 Fig. II. Length frequencies of larvae with seven-spined 

 telson arranged according to their degree of development. 



A, seven-spined larvae in which the telson form in the 

 succeeding stage can be distinguished. 



succeeding stage seven-spined. suc- 

 ceeding stage five-spined. 



B, seven spined larvae arranged with reference to nine 

 selected larvae (see Fig. 8). 



— — — degree of development a-d. degree 



of development e-j. 



8 e 10 II 



LENGTH (UNITS) 



13 UNITS 



Fig. 10. Length frequencies of : ^, mandibular palp; 

 B, first thoracic appendage; C, antennular flagellum. 



Table XVIII. Length frequencies of mandibular palp, ist thoracic 

 appendage and antennular flagellum 



