a different species, Mr. Patterson proposed that it should be 

 designated as the Cydippe pomiforinis. 



The disappearance of the internal ramiform vessels was 

 next noticed, and the steps by which the writer was enabled 

 to ascertain that the species now brought forward was iden- 

 tical with that described by him in 1835 ; and consequently, 

 that a Beroe, of the occurrence of which we have no record, 

 except of one individual taken in 1820, was abundant on 

 the Irish coast. Particular reference was made to Doctor 

 Grant's paper (Zool. Trans, vol. i. p. 9,) on B. Pilens, with 

 a view to indicate the several points of agreement and of 

 difference between these, the only two British species of 

 tentaculated Beroes. The structure of the Cilia, the aqueous 

 currents at their base, the position and structure ofthetenta- 

 cula, the food of the Beroe, its vitality, consistency, want of 

 phosphorescence, movements, iridescence, times of appear- 

 ance, and diffusion round the coast, formed the principal 

 topics embraced in the remainder of the paper. 



The occurrence of the Bolina on different parts of the 

 Irish coast was mentioned, principally for the purpose of 

 enabling Mr. Patterson to refer to some points of its economy 

 for comparison and contrast with the C. pomiformis. He 

 reserved a detailed account of various particulars concern- 

 ing it to a future opportunity, when he expected to be able 

 to exhibit additional figures taken from living specimens, 

 and more accurately delineated than those at present brought 

 forward. Meantime, as the animal differed from the two 

 species of Bolina described by Mutius, he proposed to name 

 it provisionally Bolina Hibernica. 



The President read a paper by the Rev. Dr. Robinson 

 " on the Longitude of the Armagh Observatory, given by 

 Chronometers and other Methods." 



After remarking the inconveniences, or uncertainties, 

 which to a certain extent attend the methods of determining 



