PLATE 



FIGS. 



1-7. Styela tuberosa (Macg.). (p. 102) 1-3. Test and 

 mantle laid open, exposing (in fig. 1) branchial 

 sac, (in fig. 2) branchial sac and reproductive 

 organs, and (in fig. 3) digestive and reproductive 

 organs, the branchial sac being removed. 4-7. 

 Reproductive organs, various views : magnified. 

 8 and 9. Styela informis (Forbes), (p. 104) 8. Test and 

 mantle removed, exposing branchial sac. 9. 

 Branchial sac removed, exposing digestive and 

 reproductive organs. Both figures natural size. 



