5R6 



ALEXANDER MEEK 



along tho outer wall of the genital wing, but they are small 

 on tho inner wall of the wing and rise again distinctly on the 



Text-figs. 6-11. 



qo rmnrn 



blind sac 



lateral 



pigment 



Figs. 6-11. — Transverse sections of the post-branchial region. The 

 left side is on tlie reader's left. The reconstructed relationship 

 of the gonad and gill is shown on the left side, the section as cut 

 on the right. 



medial side of the gill-pores. As usual the space imme- 

 diately at the side of the dorsal and ventral mesenteries is 

 devoid of muscle, and along the line of the gonopores there 



