PLATE XLIV. 



FIGS. 



1-3. Styela fibrillata sp. nov. (p. 125) 1. Test removed 

 and mantle laid open, exposing outer surface of 

 branchial sac. 2. Branchial sac partly removed, 

 showing its inner surface, and exposing digestive 

 and reproductive organs. 3. Branchial sac wholly 

 removed, showing digestive and reproductive 

 organs more clearly. About twice natural size. 

 4 and 5. Styela depressa sp. nov. (p. 126) 4. Test and 

 mantle laid open, exposing branchial sac. 5.- 

 Branchial sac removed, exposing digestive and 

 reproductive organs. About three times natural 

 size. 



6. Styela nortlinnibrica sp. nov. (p. 127) Test removed, 

 mantle laid open, and branchial sac removed, ex- 

 posing digestive and reproductive organs. About 

 four times natural size. 



