H ADDON — On the Fauna oj Dublin Bay. 627 



same bay (pi. vii., fig. 2). Dr. Melville considered that these two were 

 specifically identical. In the British Association Eeport for 1857 (Dub- 

 lin), p. 103 of the Sectional Communications, Prof. J. E. Greene states 

 that " the siphonophorae were represented by the beautiful Agalmopsis 

 of Sars." When I add that there are dried specimens of Velella spirans(?) 

 from Dalkey (presented by Dr. J. Tufnell), collected on September 5, 

 1867, I have recorded all I have been able to gather concerning the 

 occurrence of this most interesting group of Hydrozoa in Dublin Bay. 

 Cydippe [Pleurobrachia) pileus (?) is very abundant. I am under the 

 impression that we have more than one species of Cydippe. I have 

 ■only one specimen of a Beroe. 



AcTrNOzoA. — EdwanUia sp. incert. This is a miaute specimen 

 18mm. (-§- inch) in length, of a uniform pale pink colour, which I 

 form.d on June 27, 1881, at Salthill, in dirty sand, between tides, 

 but which has not been met with since. It appears to be a new species, 

 but, beiag undoubtedly immature, I will not venture to describe it. It 

 would not be out of place to here mention Salcampa ehrysanthellum,^ 

 which was discovered by my friend and former pupil, Miss A. Shannon, 

 at Malahide, on September 14, 1883, and which I have described and 

 figured in the Proceedings^ Royal Dublin Society, jST. S., vol. iv., 1885, 

 p. 396 ; also in the same number of that Journal will be found, p. 399, 

 -an account of the habits, and a full description, with plates, of PeacMa 

 hastata, Gosse, first discovered in Dublin Bay by Mr. G. Y. Dixon, and 

 exhibited by him at the Dublin Society, on November 14, 1884. So 

 far as I am aware, this is the first time that any member of the three 

 families to which the above severally belongs has been found in 

 Ireland. 



Seliactis (^Sagartia) hellis, Ellis, occurs at Malahide. H. (S.) 

 venusta, Gosse, has been found by Mr. Dixon and myself at Dalkey 

 Island. I hope on a future occasion to publish a revised list of our 

 Irish Anemones ; in the meantime I fully concur with Prof. Andres 

 in regarding S. rosea, S. nivea, and S. aurora of Gosse, as varieties of 

 S. venusta, Gosse ; the two former occur at Dalkey Island, and I have 

 dredged ]I.[S.) miniata, Gosse, off Bray Head, in twenty -thi-ee fathoms, 

 and it also occurs at Dalkey. Cylista undata, Miill. (= Actinia troglo- 

 dytes, Johnst., has been found both at Monkstown ancl Dalkey. 



[On June 3, 1885, in Kingstown Harbour, and again on June 20, 

 at Dalkey,^ I caught in the tow net a Thaumantias, with a minute 

 Anemone attached to its stomach on the sub-umbrella ; both were a 

 little under 3mm. in length. The first was killed after keeping it alive 

 a day or two, and it, together with the second living specimen, was 

 exhibited at the Academy, at the meeting on June 22. The latter 



^ Having recently had several specimens of Halcampa from MalaHde, and 

 finding that they all vary, I feel it would be wiser to withdraw the name {H. andresii 

 I gave to this specimen, and to refer them all to H. chrysanthellum. Peach. I 

 propose to publish a note on this species. 



5 Mr. Jacob brought me two other specimens from Dalkey on July 3, 1885. 



