PLATE XXXIV. 



FIGS. 



1-5. Styela tuberosa (Macg.). (p. 102) 1. Test : natural 

 size. 2. Branchial aperture : twice natural size. 

 3. Mantle : natural size. 4. Branchial sac : 

 twice natural size. 5. A young individual : 

 natural size. 

 6. Styela informis (Forbes), (p. 104) Test: natural 



size. 



7 and 8. Styela mamillaris (Gaertn.). (p. 106) 7. Test: 

 natural size. 8. Mantle : natural size. 



