238 
a different species, Mr. Patterson proposed that it should be 
designated as the Cydippe pomiformis. 
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 BerGe, 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 Berdes. The structure of the Cilia, the aqueous 
currents at their base, the position and structure of the tenta- 
cula, the food of the Bere, 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 Rey. 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 
