INTRODUCTION. 7 



PoLYCHiETA. — ApJivodite aculeata, 



MoLLUSCA. — Li7na loscombii and Corbula gibba. 



The most important forms obtained during the cruise of 

 the " Hyaena" were : — Garveia nutans, Cucumaria pentactes, 

 Malmgrenia castanea, Mysis spiritus, Thia polita, Pilumnus 

 hirtellus, Pandalus brevirostris, Eolis gracilis, Eolis picta, 

 Sepiola atlantica, and Loligo media. 



The tow-nets were used frequently, capturing Medusoid 

 Gonophores, Pleurobrachia, many Copepoda, and various 

 larval forms (chiefly Crustacea). 



During May, June, and July, several expeditions were 

 organised to explore Hilbre Island and the neighbourhood at 

 low tides. These were largely attended, and very con- 

 siderable collections have been formed of the species living 

 between tide marks on the shore. 



Hilbre Island is well known amongst the local naturalists 

 on account of its comparatively rich marine fauna. It is 

 certainly the most interesting spot in Liverpool Bay from a 

 biological point of view, and it would be the most suitable 

 locality, within a reasonable distance from Liverpool, for the 

 establishment of a marine laboratory for carrying on biolo- 

 gical investigations. 



The rocks at the northern end of the Island are covered 

 at and about low water mark by a rich and varied assemblage 

 of invertebrate animals, and form a particularly favourable 

 locality for certain Hydroid Zoophytes, Actiniae, Polyzoa, and 

 Nudibranchs. A complete account of the fauna of Hilbre 

 Island, with a description of the conditions, so far as they are 

 known, under which the various species live, is one of the 

 objects which the Liverpool Marine Biology Committee have 

 set before them, and it will probably form a considerable 

 part of one of their future Keports. 



Among the more important species which were found 



