Mr. Thompson's Additions to the Fauna of Ireland. 251 



Plumularia pennatula, Ellis and Soland. Johnst. B. Z. 145. pi. 18. 

 f. 1,2. Specimens of this rare and beautiful species profusely 

 invest about six inches of the stem of a Laminaria digitata ob- 

 tained in a fresh state by Miss M. Ball at Youghal in 1837. It 

 must rather I presume have been owing to the East Indies 

 being the locality whence the specimens described by Ellis and 

 Solander were brought, than to any fault in Fleming's descrip- 

 tion (which seems as good as one so brief could be) that led 

 some authors on the continent to attribute it to other species. 

 The Irish specimens correspond with the descriptions in the 

 works of Ellis and Solander, Fleming and Johnston, and with 

 the figures in the first and last — some of them are 4^ inches in 

 height. 



Laomedea gelatinosa, Lamour. Johnst. B. Z. 152. pi. 21. f. 3, 4, and 

 pi. 23. f. 1. Youghal, Miss Ball; Bangor, county Down, Oct. 

 1835. W. T. In the ordinary state parasitical on Zostera marina 

 in both localities. Miss Ball has likewise obtained specimens 

 presenting the finest state of the species, and 11 inches in 

 height. See Brit. Zoop. pi. 23. f. 1. 



Campanularia syringa, Lam. Johnst. B. Z. 155. f. 18. Of this spe- 

 cies, which has not a place in Mr. Templeton's published 

 catalogue, I find specimens labelled " Belfast Lough," in his 

 collection — to myself it has occurred on the coasts of Down 

 and Dublin. 



Campanularia? dumosa, Flem. Johnst. B. Z. 157. pi. 23. f. 2 — 5. 

 On Tubularia indivisa at Youghal 1836. Miss Ball. 



On Serialaria lendigera and various corallines in Belfast Bay, W. T. 



Caryophyllia Smithii, Stokes and Brod. Johnst. B. Z. 207. vign. p. 

 206. A few specimens were procured at Youghal, by Miss 

 Ball, in April 1 836, and subsequently — diameter of the largest 

 7^ lines. 



Actinia dianthus, Ellis, Johnst. B. Z. 216. pi. 28. Belfast bay. Dr. 

 Drummond; Edm. Getty, Esq., Strangford lough, W. T. 

 Amongst the various forms it assumes, I have seen this species 

 present the exact appearance of the Act. plumosa of the Zoo- 

 logia Danica. Mr. Terapleton marks it with doubt as Irish. 



Actinia mactdata, Adams, Johnst. B. Z. 218. f. 32. This extremely 

 beautiful species, taken by dredging in Strangford lough, in 

 January 1835, by Mr. Hyndman and myself, has subsequently 

 occurred to us commonly there and in Belfast bay — to Bulla 

 lignaria as well as the larger Trochi it is occasionally found 

 attached. Evciy shell that I have seen the A. maculata invest 



