108 CHAS. L. WALTON. 



Lanice conchilega, Pallas. Local. (C. L. W.) 



Arenicola marina, Linnaeus. Abundant on Cockle beds in estuaries. 



(C. L. W.) 

 Cirratulus cirratus, 0. F. Miiller. Aberystwyth. (H. J. F.) 

 Pomatoceros triqueter, Linnaeus. Not uncommon under stones. (C. L. W.) 

 Spirorbis borealis, Daudin. General on Fucus, etc. (C. L. W.) 

 Sabellaria alveolata, Linnaeus. Locally very abundant near sandy 

 areas, and has then a considerable influence in binding together 

 boulders and loose stones. It is almost invariably accompanied 

 by Eulalia viridis and Viva, but precludes many other species by 

 filling up the crevices and bases of rocks and stones which otherwise 

 afford them shelter. (C. L. AV.) 



GEPHYEEA. 



Sipunculus nudus, Linnaeus. One specimen, Aberystwyth. (H. J. F.) 



POLYZOA. 

 Scrupocellaria reptans, Linnaeus. Aberystwyth. (C. L. W.) 

 Membranipora pilosa, Linnaeus. Aberystw}i;h, etc. (C. L. AV.) 

 M. membranacea, Linnaeus. Aberystwi^th. (C. L. W.) 

 Crisia cornuta, Linnaeus. Under stones, Aberystwyth. (C. L. W.) 

 C. denticulata, Lamarck. Aberystwyth. (C. L. W.) 

 Alcyonidium hirsutum, Fleming. L^pon Algce, Aberystwyth, Borth, etc. 



(C.L.W.) 

 Amathia lendigera, Linnaeus. Upon old Mussels, Aberdovey. (C. L. W.) 

 Bowerbankia imbricata, Adams. With above. (C. L. W.) 

 Pedicellina cernua, Pallas. With A. hirsutum, Clarach. (C. L. W.) 



MOLLUSCA. 



Acanthochites fascicularis, Linnaeus. Aberystwyth, etc. (C. L. W.) 



Trachydermon cinereus, Linnaeus. Aberystwyth. (H. J. F.) Morva, 

 Clarach. (C. L. W.) 



Patella vulgata, Linnaeus. Abundant ; mainly on the sheltered land- 

 ward side of shelving rocks, and then often of very large size. 

 (C. L. W.) 



Helcion pellucida, Linnaeus. Aberystwyth, above extreme low tides 

 rather rare. (H. J. F.) Fairly common on Laminaria when tides 

 are unusually low. (C. L. W.) Coves, Gwbert-on-Sea, fairly common. 

 (C. L. W.) One specimen was discovered near Aberystwyth at 

 high-water mark attached to a stone, evidently due to Laminaria^ 

 cast up after storms. 



