﻿248 Proceedings of the Boyal Physical Society. 



Eemaeks ox the Foeegoixg Lists. 



1. Pielatio'ii to Fresh Water. 



The following are the only species which were found to 

 occur in the living state . where bathed by fresh water. The 

 upper limit of their occurrence is indicated in brackets after 

 each. 



It is noteworthy that all the above species occur as high 

 up on the shore as Zone 2, Upper, and that some occur as 

 high as Zone 1, Upper. The only other forms (exclusive 

 of the semi-terrestrial Drift Fauna) which were found 

 above Zone 3, were Ehabdoccels, Patella vulgata., Modiola 

 modiolus, Littorina oltusata^ Hyale nilssoni. These were 

 not recorded from fresh water. Of them Littorina ohtusata 

 is almost invariably found on weed, whilst Hyale nilssoni 

 we have taken only amongst weed. Further investigation 

 may reveal the presence of Ehabdoccels and of Limpets in 

 fresh water conditions. The conclusion seems warranted 

 that species which live high up on the shore possess con- 

 siderable power of resisting unfavourable conditions, as is 



Coryne pusilla 

 Actinia equina 

 Sagartia troglodytes 

 Procerodes ulvce 

 Psammoryctes costatus 

 Psamnioryctes sp. 

 Enchytrceids, various 

 Sjpirorhis horealis 

 Alcyonidium mytili 

 Purpura lapillus 

 Littorina rudis 

 Littorina littorea 

 Balanus halanoides 

 Gammarus marinus 

 Go.mmarus locusta 

 Ldotea granulosa 

 Jeer a alhifrons 

 Ligia oceanica (juv.) 

 Carcinus mcenas 



(Zone 1, Upper). 

 (Zone 2, L^pper). 

 (Zone 2, L'pper). 

 (Zone 1, L^pper). 

 fZone 2, Upper). 

 (Zone 1, L^pper). 

 (Zone 1, Lower). 

 (Zone 1, L'pper). 

 (Zone 1, Lower). 

 (Zone 1, L^pper). 

 (Zone 1, Upper). 

 (Zone 2, L^pper). 



(Zone 2, Lower). 

 (Zone 1, Upper). 

 (Zone 2, L'pper). 

 (Zone 1, L'pper). 

 (Zone 1, L^pper). 

 (Drift, Lower). 



(Drift, Lower). 



