REPRODUCTION OF ASELLDS AQUATICUS. 



343 



EXPLANATION OF THE PLATES. 

 Plate 25. 



Fig. 1. Last thoracic leg (7th), for comparison with the specialised legs in PL 25. figs. 2 



& 3. x 30. 

 Fig. 2. 1st thoracic leg of d- X SO. 

 Fig. 3. 4th „ „ „ x 30. 



Fig. 4. ftEaxillipede of a female during the non-reproductive stages, x 30. 

 Fig. 5. ,, „ „ „ „ brood-pouch stage, x 30. (Notice the coxal 



lobe ep. ) 

 Fig. 6. 1st abdominal appendages of cj with the spout-like terminations of the vasa 



deferentia. x 30. 

 Fig. 7. 2nd abdominal appendages of <J . x 30. 

 Fig. 8. 1st abdominal appendages of $ . x 30. 

 Fig. 9. Variation of 1st abdominal appendage of 2 . x 30. 



Plate 26. 



Fig. 10. Ventral view of female. X 10. All the thoracic legs, except the 1st left, have 

 been cut oil*. 



Fig. 11. Aq oostegite, ventral view. X 40. A part of the leg is omitted. 



Fig. 12. Transverse section through the 5th thoracic segment of 2 taken after impreg- 

 nation by the male but before the eggs were laid, x 40. 



Reft 



ex. coxopodite. 



bp. basipodite. 

 inch, ischiopodite. 

 mer. meropodite. 



cp. earpopodite. 



pp. propodite. 

 dcp. dactylopodite. 



ep. coxal lobe. 



I. leg in T. S. 



oost. oostegite in section. 



i. intestine. 



n. nerve-cord. 



he. hepatic caecum. 



nu-p. maxilliped. 



li. 1st thoracic leg. 

 nost. oostegite. 

 pled 1 . 1st abdominal appendage. 

 exp. exopodite of the 3rd abdom. append- 

 age. It acts as an operculum for 

 the other branchiae. 

 ov. ovary. Egg, full size, ready to be 



passed out. 

 sp. mass of spermatozoa in the recepta- 

 culuni seminis. 

 v. vee. aperture for entrance of sperm-mass 

 and for escape of eggs. 



