﻿246 Proceedings of the Boyal Physical Society. 



Nereis pelagica^ L. Abundant. 

 Eulalia sp. 



Harmotho'e imhricata, L. 



Amphitrite johnstoni (Malmgren). 



Spirorbis borealis, Daudin. Very small. 



Memhranipora memhranacea (L.). 



Anemia ephippium, L. 



Mytilus edulis, L. 6 to 10 mm. 



Modiola modiolus, L. 5 mm. 



Saxicava rugosa var. arctica (L.). 7 to 9 mm. 



Helcion pellucidum (L.). 



Gihhula cineraria (L.). 



Egg Capsules of Purpura lapillus (L.). 



Rissoa striata (J. Ad.). 



Amphithoe rubricata (Mont.), and young in nest; fairly 



common. 

 Botrylloides violaceus, M. Edw. 



iv. On Fucus serratus. 



Glytia johnstoni (Alder). | On the weed, and on the encrusting 

 Sertularia pumila (L.)'. J Polyzoa. 

 Spirorbis borealis, Daudin. 

 Membranipora membranacea (L.). 



pilosa (L.). 

 Alcyonidium hirsutmn (Flem.). 



„ mytili, Daly. Thinner and flatter than on stone. 

 Flustrella hispida (Fabr.). 



V. On Cladophora Rupestris. 

 Bowerbankia imbricata (Adams). 



vi. On Chondrus Crispus. 

 Alcyonidium gelatinosum (L.). 



