THE DEVELOPMENT OF MYSIS. 



305 



Fig. 79.— Continued. 



14&<X 



Fig. 79.— The development of Mysis.—A, eide view of an egg. in which the blasto- 

 derm has just appeared. B, side view further advanced. C, front view of embryo 

 at the same age, showing the procephalic lobes, here marked b. Z), larva, ventral 

 view. E, side view. (These two figures have been inverted by the engraver.) 

 F. young pupa. G, further advanced. H. youiiir Mysis, which has left its pupa 

 skin. /, anterior portion of the same, enlarged, and with the carapace thrown 

 back, a. vitelline membrane : b. yelk ; c. central depression of the blastoderm ; 

 d. procephalic lobes;/', larval integument: g. its caudal enlargement; h, cara- 

 pace. 1. 2, 3, 4, etc., the somites and their appendages, numbered from before 

 backward. 



