PLATE XXXIII. 



FIGS. 



1. Cynthia ovata sp. nov. (p. 84) Mantle laid open, 

 exposing branchial sac and portions of the diges- 

 tive and reproductive organs : about twice natural 

 size. 



2-5. Cyntliia moms Forbes. (p. 86) 2. Mantle laid 

 open, exposing branchial sac. fr. " fringe formed 

 by the projecting ends of the longitudinal rods." 

 3. Branchial sac removed, exposing digestive and 

 reproductive organs. l>r. s. " cut end of branchial 

 sac/' r. d. " reproductive ducts." Both figures 

 about twice natural size. 4. A cluster of nodules 

 composing the reproductive organs : much en- 

 larged. 5. A few of these nodules further en- 

 larged, v. d. " branch of vas deferens." 



6 and 7. Cynthia tesseUata Forbes. (p. 89) 6. Mantle 

 laid open, exposing branchial sac. mo. " mouth 

 separated from the oesophagus." 7. Branchial 

 sac turned over, exposing digestive and repro- 

 ductive organs, nod. " angular nodules." Both 

 figures about twice natural size. 



