94 



ALDERNEY MARINE ZOOLOGY. 



ECHINODERMS. 



These, with the exception of a Sea Cucumber and a Sand 

 Star, were not numerous. Cucumaria Pentactes, with a white 

 skin and black tentacles, was quite common in the crevices of 

 the rocks. It is about five inches long. Ophiura albida, a 

 small sand-loving* Brittle Star, was common at low tide, though 

 I have not seen it in Guernsey in similar places. Asterina 

 gibbosa, so common with us, was very rare in Alderney, only 

 two specimens being met with. A Synapta, presumably 

 S. inhtzrens, occurred in the sand. 



MOLLUSCA. 



Univalves, bivalves, and nudibranchs are all as much in 

 evidence in Alderney as they are in Guernsey. Chief interest 

 centres around a Nudibranch, which is new to the Sarnian 

 list. This is a species of Eolis, a red tentacled animal about 

 an inch long, which has not yet been satisfactorily identified. 

 Ely sia mridis, living on C odium as usual, was rare. It has 

 been very rare in Guernsey during 1908 and 1909, while in 

 1907 it swarmed everywhere. 



Very fine specimens of Doris tuberculata were found, 

 besides eggs of several other species of sea slugs. 



An exceptionally fine specimen of the beautiful golden 

 Triopa claviger was found. Chiton ruber, a reddish mail 

 shell or multivalve, is new to the Alderney list ; while Natica 

 Alder V, Anomia patelliformis, and Pecten Maximus are not 

 recorded living, although dead shells have been found. P. 

 varius, extremely common with us, was represented by a 

 single specimen. 



The Crustacea found, with the exception of Perimela 

 dentictilata, were very ordinary ; while the Worms, Ascidians 

 and Fishes, were all of the common types, and need not be 

 mentioned in these notes. I append a list of additions to the 

 recorded fauna of Alderney. 



CCELENTERATA. 

 Sagartia bellis, v. tyriensis. 



S. venusta. A few colonies. 



S. nivea. Fairly frequent. 



S. sphyrodeta. Fairly frequent. 



Adamsia palliata. One fine specimen. 



Anthea cereus. 



v. Smaragdina. Common. 



V. PUStiea. Not common. 



Aetinia mesembryanthemum. 



V. hepatiea. Common. 



