PTEROPODA. 271 



Genus RossiA. 



R. Oicenii, Ball. 

 Dublin Bay, Dr. Ball. 



R. Jacohi, Ball. 

 Belfast Bay, Mr. J. Grainger. Dublin Bay, Dr. Jacob. 



Genus Spirula. 

 S. Justralis, Flem. 



"White House, Belfast Bay, Portrush. Templeton, MSS." MagilHgan, 

 Mr. Hyndman ; Youghal, Dr' Ball ; Clare, Professor Harvey. 



CLASS PTEROPODA. 



Genus Hyal^a. 

 //. trisphiosa, Cuv. 



An individual of this species, and the first Pteropod, I believe, that 

 has occurred on the British shores, was found by Dr. R. Ball on the coast 

 near Youghal, some years ago. At the same time SpirulcB and lanthince 

 occurred, but none of them in a living state. 



Genus Peracle. 

 P. Flemhujii, Forbes. 

 In shell-sand, Bundoran, Mrs. Handcock. Dredged off Mizen Head, 

 Mr. M'x\ncb-ew. South Island of Arran, Mr. Bai'lee. 



CLASS GASTEROPODA. 

 ORDER NUCLEOBRANCHIATA. 



Genus Sagitta.* 

 S. Britannica, Forbes. 



Coast of Cork, Professor AUman. 



Mollusca Nudibranchia, Cuv. 



Genus Doris. 

 D. tuherculata, Cuv. 

 In the late Mr. Templeton's Journal, " Doris Arr/n, Penn., Brit. Zool., ]). 

 22," is mentioned as twice found by him in 1812, on the shore towards 

 the entrance of Belfast Bay; and Dr. J. L. Drummond informs mc, that 

 about the same time he procured a Doris here, equalling a hen's egg in 

 size, and which he considered to be of this species. At Youghal (County 

 Cork) it has been taken by Dr. Ball, and to this gentleman and myself 

 has occurred at the island of Ireland's Eye, off' the ])ublin coast. Pro- 

 fessor Allman has favoured me with specimens ])rocured by him at 

 Courtmasherry harbour, County of Cork, where he states that the species 

 is common. The Irish specimens I have seen were generally straw-co- 



* Now separated from Mollusca. — Ed. 



