PLATE XLIX. 



FIGS. 



1 and 2. Clavelina lepadiformis (Mull.) Sav. (p. 152) 1. 

 A cluster : twice natural size. 2. Part of bran 

 chial sac : magnified. 



3. Clavelina corrugata sp. nov. (p. 155) Two indi- 

 viduals : twice natural size. 



4-6. Diazona hebridica Forb. & Goods, (violacea Sav.). 

 (p. 160) 4. A "common mass : '' two-thirds 

 natural size. 5. A single individual : one and 

 a quarter natural size. 6. Part of branchial sac : 

 magnified. 



