232 The hish Naturalist. 



Especially abundant was the delicate Plumularia eclmiulata, 

 Lamk., growing on quite a variety of objects. 



Actinozoa. — On one of the ledges of rock a considerable 

 number of specimens of Metridium (Actinoloba) dianthus, Ellis, 

 were found, of the brown and white varieties. Cylista tmdata, 

 Mull., was represented by an immature specimen. The com- 

 mon Actinia cqtu?ia, Linn, was abundant everywhere. One of 

 them has since increased my stock of anemones by six young 

 ones. Several specimens of Ancmonia sulcata, Penn., both the 

 variety with iridescent green, rosy tipped tentacles, and the 

 one with plain grey tentacles were obtained. Bunodes gem- 

 maceus, E- & S., was represented by three or four young ones, 

 while large numbers of Tealia crassicornis, Mull., were seen. 



EchinodKRMATA. — Only two species of Ophiuroids were 

 obtained — Ophiothrix fragilis, Mull., and Amphiura elegans, 

 Leach. 



Vermes. — Under the stones, Lineus marinus, Mont, was 

 found, while Phyllodoce viridis, Linn., was common at low 

 water, creeping amongst the crevices of the rocks. The 

 arenaceous tubes of Terebella, and the smooth tubes of mud 

 formed by Sabella were obtained, but unfortunately not the 

 inhabitants themselves. 



Of the Polyzoa I identified about thirty species. Of these 

 the following are recorded in the Brit. Assoc. List as being 

 rare in Co. Dublin : — Eucratea chelata, Linn., Bicellaria ciliata, 

 Linn., Cribrilijia punctata, Hass., Valkeria uva, Linn., and 

 Pedicellina cenma, Pall. Schizoporella unicornis, Johust., is 

 new to Co. Dublin. It has only been previously recorded for 

 Ireland from Antrim. This is the first time Alcyonidhim 

 mytili, Daly, has been mentioned for Ireland, though con- 

 sidering its abundance in Dublin Bay and elsewhere around 

 the Irish coasts, it has probably been passed over for some of 

 the other species of the genus. It is very probable that the 

 Sarcochitum polyotim, of Hassall 1 , obtained from Dublin Bay 

 growing on Fucus shells and stones, belongs to this species. 



Moixusca.— Of the Nudibranchs, I obtained several 

 specimens of the beautiful Eolis coro?iata, Forbes, upon the 

 lower part of the stems of Halidrys siliquosa. Also a single 

 example of Eolis exigua, Aid. and Hanc. This minute species 

 has previously been recorded for Co. Dublin by Prof. Haddon, 

 from Kingstown Harbour. 



1 Ann. Nat. Hist., vol. vii., p. 484. 



