ROYAL IRISH ACADEMY. 
205 
“ The specimen is shorter and more robust than G. gracilis ; the seg¬ 
ments are brought closer together; the dorsal line of the kephalon and 
per cion is more arched; the antepenultimate joints of the lower antennae 
do not extend beyond the anterior margin of the carapace. I have, 
therefore, thought it advisable for the present to retain Thompson’s 
name, rather than absorb the species into that previously described. 
Having seen but a single specimen of each, I have not had the advan¬ 
tage of dissection to compare their separate details.”— On a New Genus 
and new Species of Diastylidcc, by C. Spence Bate, F. L. S.: Journal of 
the Royal Dublin Society, vol. ii. 
Other members of the group have occurred on the coast of Galway to 
Professor Melville, which I hope may be also brought at some future 
period before your Society. 
Mr. Stephen M. Yeates exhibited a beautiful modification of the gas 
microscope, showing its applicability to illustration of microscopic pre¬ 
parations, as, owing to modifications in the structure of the instruments, 
it is possible, at a very slight expense, to exhibit to an audience objects 
which require high magnifying powers. Specimens of Arachnodiscus, 
and dissections of many insects, were distinctly shown. Photographs 
taken from objects by means of the instrument were also exhibited. 
The Chairman declared Mr. William Laughrin, of Polperro, duly 
elected a Corresponding Member. 
The Society then adjourned to November. 
[Note on Pandalus Jeffreysii (Spence Bate), and Pandalus Leptorhyn- 
cus (_Kinahan ).—A critical examination of Pandalus Jeffreysii , through 
the kindness of its discoverer, has proved to me that the species of HSsop 
prawn found by me at Sandycove, and recorded in the December Meet¬ 
ing of the Natural History Society ( vide ante), is distinct. The name 
P. leptorhynchus must, therefore, as suggested provisionally, be applied 
to the new species, P. Jeffreysii not yet being recorded as Irish.—J. R. 
Kinahan, M. D., June 8, 1858.] 
ROYAL IRISH ACADEMY. 
MONDAY, APRIL 12, 1858. 
John Kells Ingram, LL. D., Vice-President, in the Chair. 
Rev. Charles B. Gibson, Edmund T. Palmer, and Thomas Brooke, Esqrs., 
were elected Members of the Academy. 
The Chairman read the following Address, presented on the 19th of 
March last, to his Excellency the Earl of Eglinton and Winton, Lord 
Lieutenant, &c. &c., of Ireland :— 
VOL. V.-PROC. SOC. 2 E 
