PLATE CXVII. 
Fie. 
1. Pomatoceros tiiqueter, L., removed from its tube. St. Andrews. Enlarged. 
la. The same species projecting from its tube. St. Andrews. Enlarged. 
1. Group of tubes of the foregoing. St. Andrews. 
2. Group of tubes of Filograna implexa, Berkeley, with the annelids projecting from them. 
Plymouth. Enlarged. 
2a. Body of an example without a bud, but bearmeg reddish ova. ‘The branchize are 
omitted. 
2. Another with a commencing bud. Plymouth. Enlarged. 
2c. Bud further advanced in an example from Plymouth. Knlarged. 
2d. Anterior region of a young example with an operculum. Hnlarged. 
2¢. Ventro-lateral view of a young specimen with ova and few thoracic bristles. 
Hnlarged. 
3. Manayuikia (Haplobranchus) estuarius, Bourne, from Sheppey. Enlarged. 
a. Anterior region of the same. Magnified. 
SG 
Oo 
