﻿244 Proceedings of the Royal Physical Society. 



ZONE 3. 



B. Where fresh water percolates. 



i. In Substratum. 



Procerodes ulvce (Oersted). 

 Psammoryctes costatus (Clap.). 

 Gammarus marinus, Leach. 

 Jcera alhifrons, Leach. 

 Dead Shells, Tests, etc. — 



Polystomella crispa, L. In the sandy clay ; fairly abundant, 

 well preserved. 



Rotalia sp. 



Spirorhis sp. 



Echimts esculentus (L.). Fragment of test and spines. 



Mytilus eduUs, L. 



Mactra suhtruncata (da C). 



Patella vulgata, L. Many small; 15 to 25 mm. 



Gihhula cineraria (L.). 



Purpura lapillus (L.). 



Littorina littorea (L.). 



5, rudis (Maton). » 



„ ohtusata (L.). 

 Lacuna divaricata (Fabr.). 

 Tests of Ostracods. 

 Balanus halanoides (L.). 

 Carcinus mmnas (Penn.). Remains. 



ZONE 4. 



Note. — Only one haul (Haul IV.) was taken in this zone. The 

 records are therefore not representative of the complete 

 fauna. 



i. Upper Surface of Stones. 



Folliculina ampulla (Miill.). A loricate Infusorian ^ on Spirorhis 

 horealis, 



Folliculina elegans (Clap, and Lach.), on Balanus crenatus. 

 Halichondria panicea (Pall.). 

 Tuhularia simplex, Alder. 

 Clytia johnstoni (Alder), 



^ Savile Kent, Manual of Infusoria, pi. xxix. fig. 40. 



