﻿Study of the Animal Ecology of the Shore. 241 



Procerodes idvce (Oersted). Numerous ; cocoons numerous. 



Alcyonidium mytili, Daly. 



Mytilus edulis, L. 10 to 20 mm. long. 



Purpura lapillus (L.). 



Littorina rudis (Maton). 



littorea (L.). 

 Balanu^ hcdanoides (L.). 

 Idotea granulosa, Rathke. 

 Carcinus mcenas (Penn.). 30 mm. 



ZONE 3. 



A. Where fresh water does not occur, 

 i. Upper Surface of Stones. 



Sycon compressum, auctt. 1 cm. 

 Halichondria panicea (Pallas). 



incerta, Bowerbank. 

 Clava midticornis, Forskal. Very small, not more than 1'5 mm. 

 Campanularia flexuosa, Hincks. 

 Sertularia pumila, L. 

 Actinia equina, L. 



Sagartia troglodytes, Johnst. In crevices of smooth rock. 



Rhabdocoels. A few. 



Spii'Oi'bis horealis, Daudin. 



Anoraia ephippium, L. 



Patella vulgata, L. Adult ; and 3 mm.^ 



Acmoea testudinalis (Miill.). 



Gihbula cineraria (L.). 



55 umbilicata (Mont.). 

 Purpura lapillus (L.), and egg capsules. 

 Littoj^ina littorea (L.). Travelling. 



55 ohtusata (L.). Travelling; more active than the others. 



5 5 rudis (]\taton). 

 Lacuna divaricata (Fabr.). 

 Archidoris tuherculata (Cuv. ). 6 cm. 

 Balanus halwioides, L. 



5, crenatus, 1 Brug. Basal plate only. 

 Yeri'uca stromia (O.F.M.). 

 Various Ostracods. 



A few of some ova which were artificially fertilised gave segmentation 

 stages. 



VOL. XYII. U 



