DUBLIN UNIVERSITY ZOOLOGICAL AND BOTANICAL ASSOCIATION. 175 



J. R. Geeene, Hon. Sec, read a paper — 



ON THE ACALEPH^) OP THE DUBLIN COAST J BEING PAET I. OF A SEEIES OP 

 " NOTES ON MARINE ZOOLOGY." 



The following is a list of the Acalephae hitherto observed by me on the 

 Dublin coast. They have all been taken in Kingstown harbour during 

 the summer of 1856. They may be thus arranged : — 



1. Physogeada. 

 Agalmopsis elegans. 



2. Ciliogeada. 

 Cydippe pomiformis. 

 Cydippe pileus. 

 Beroe ovata. 

 Mnemia [Norvegica. 



3. Discophoea. 

 oedee i. steganophthalmata. 



Aurelia aurita. 

 Aurelia campanulata. 

 Cyanea capillata. 

 Cyanea Lamarckii. 

 Rhizostoma pulmo. 



OEDEE II. GYMNOPHTHALMATA. 



Geryonopsis delicatula. 

 Thaumantias lucifera. 

 Thaumantias Thompsoni. 

 Thaumantias inconspicua. 

 Sarsia tubulosa. 

 Bougainvillia Brittanica. 



It is not my object at present to enter into any details concerning 

 the structure or habits of the Acalephs just mentioned. 



With regard to Agalmopsis elegans, I may state that the species so 

 named coincides in all respects with the figure and description of Sars 

 {Fauna littoralis Norvegice) . As to the Ciliograda (Ctenophorae), Cydippe 

 pomiformis and Cpileusweiehoth. abundant, as was also Mnemia JVbrvegm. 

 For an interesting account of these three Ciliogrades I may refer you 

 to Mr. Patterson's papers, published in the " Transactions of the Royal 

 Irish Academy :" the last-mentioned animal is by him described under 

 the name of Bolina Hihernica. I have frequently obtained specimens 

 of it which were fully 2 inches in length; it is, however, a very 

 fragile animal. Beroe ovata is much rarer than any of the preceding ; 

 I have in all taken but four specimens. Of the larger Pulmograde Me- 

 dusa (Steganophthalmata), both species of Cyanea occurred in great num- 

 bers during the months of July and August, as did also Aurelia aurita. 



