29 



PI. VII. 



i — 12. Petasma, represented from the dorsal, 

 ventral and lateral sides. 



i A — 11B. Thelycum or receptaculum seminis. 

 A. External appearance. B. The same, seen from the 

 internal side, after peeling off the crust. C. The same, 

 showing a peculiar body transferred to it by copula- 

 tion. 



PI. VIII. 



Nauplius, shortly after hatching. 2A. 



„ with 7 appendages. 2 A. 



Metanauplius. 2A. 

 Zoea. 2A. 

 Cephalic portion of a Zoea. 2D. 



,, ,, ,, „ Metazoea. 2B. 



Metazoea. 2A. 

 Cephalic portion of a young prawn. 2 A. 



2&M& 44N^h ,a & O03 & , W^^- 



