﻿Study of the Animal Ecology of the Shore. 



239 



>Dead Shells. 



Gammarus marinus, Leach. 

 Mytilus edulis, L. Half -grown. ^ 

 Patella vulgata, L. 

 Gibbula cineraria (L.). 

 Purpura lapillus (L.). 

 Littorina rudis (Maton). 



„ ohtusata (L.). 



„ littorea (L.). 



ZONE 2— LOWER HALF. 

 A. Where fresh water does not percolate, 

 i. Upper Surface of Stones. 



[ Actinia equina, L. 

 Patella vulgata, L. 



Purpura lapillus (L.). Commoner than in Upper half of Zone. 

 Littorina rudis (Maton). 



„ littorea (L.). Commoner than in Upper half. 

 Balanus halanoides (L.). 



ii. Under Stones. 



Leucosolenia hotryoides (Ellis & ^ol.). 

 Halichondria panicea (Pall.). 

 Sertularia pumila, L. 

 Actinia equina, L. 

 Various Nematodes. 



Lineus gesserensis, O.F.M. Common ; in clusters. 

 Psammoryctes benedeni (Udek.). 



( = Hemitubifex ater, Beddard). 

 j Cirratulus cirratus (Miill.). Small ; common ; in clusters. 

 Spirorbis borealis, Daudin. Abundant. 

 Theodisca mammillata, Clap. (Polychaet). 

 Cribrilina punctata (Hassall). 



Schizoporella unicornis ( Johnst. ). Over-growing Halichondria at 



one part. 

 Lepralia pallasiana (Moll.). 

 Alcyonidium mytili, Daly. 

 Modiolaria discors (L.). 2 mm. 

 Anomia ephippium, L. 

 Chiton marginatus, Jeff. 

 Patella vulgata, L. 



Purpura lapillus, (L.), and its egg-capsules. 



