852 Proceedings of the Royal Irish Academy. 



Family— ELYSIID^. 



Genus — Eltsia. 

 Elysia viridis (Montagu). 



Mysiaviridis, A. & H. (Appendix, p. xxiii,). 



Moderately common among Algae on the shore, and among 

 refuse weed in the more muddy parts of the harbour. 



Family —LIMAPONTIID^ . 



Grenus — LiMAPONXIA. 



Limapontia capitata (0. F. M.) 



Limapontia nigra (Johnst.), A. & H. (Appendix, p. xxiv.). 



Found among Algse collected between tide marks at E.eena- 

 giveen and Church Island, and dredged in Cahir River on 

 muddy ground (Gamble). 



G enus — Act^onia . 

 ActsBonia corrugata, A. & H. 

 Actceonia corrugata, A. & H. 



Found in weed material from rocky parts of the shore. 



Sub-order— TECTIBRANCHIATA. 



Section I. — Bulloidea. 



Family— A CT^ONIDiE. 



Genu s — Action. 



Actaeon tornatilis, Linn. 



Tornatella fasciata, Forbes and Hanley. 



A single specimen was dredged in Dingle Bay, on coarse 

 sandy bottom in about 25 fms., to the north of Doulus Head; 

 and was determined by Mr. Gamble. 



Family— BULLID^. 



Genus — Acera. 



Acera bullata, 0. F. Muller. 



Acera bullata, Forbes and Hanley. 



"We were informed by the Rev. A. Delap that this species 

 was at times plentiful in Valencia Harbour. 



