272 
PROCEEDINGS OE SOCIETIES. 
Pinnularia distans. 
,, peregrina. 
Pleurosigma angulatum. 
,, sestuarii. 
,, balticum. 
„ fasciola. 
,, hypocampus. 
,, quadratum. 
,, strigosum. 
Podosira hormoides. 
,, maculata. 
Ehabdonema arcuatum. 
,, minutum. 
Ehipodophora paradoxa. 
Scliizonema cruciger. 
,, comoides. 
Ampbiprora complexa ( Greg .) 
,, maxima 
Amphora quadrata ,, 
„ proboscidea ,, 
Denticula nana ? , 
Epithemia marina {Donkin). 
Schizonema Smithii. 
,, parasiticum. 
Stauroneis pulchella. 
,, salina. 
Surirella fastuosa. 
,, gemma. 
,, ovata. 
„ oyalis. 
Synedra arcus. 
„ affinis. 
,, radians. 
,, nlna. 
,, Yancherii. 
Tryblionella acuminata. 
marginata. 
punctata. 
Yavicula granulata ( Breb .) 
„ rectangnlata {Greg.) 
„ t lyra „ 
Yitzchia virgata {Roper). 
Pinnularia late-striata {Greg). 
Pleurosigma Wansbeckii {Donkin). 
Not described by Smyth. 
Professor J. Eeay Greene, Honorary Secretary, read a paper, of which 
the following is an abstract:— 
ON THE BRITISH SPECIES OE THE GENUS EQUOREA. 
In the late Professor E. Forbes’s “ Monograph of the British Yaked-eyed 
Medusae” there occurs no mention of any species belonging to the genus 
Equorea. Since the publication of that work, however, four British 
species of this genus have been figured and described, viz.:— 
1. Equorea Forskalea {Peron). First ascertained by Professor Forbes 
to be an inhabitant of the Scottish seas (vide “ Proc. Zool. 
Soc.,” Nov. 1851). 
2. Equorea vitrina {Gosse). 
3. Equorea Forbesiana {Gosse). 
These two species, previously undeseribed, were obtained by Mr. 
Gosse on the coast of North Devon {vide “Devonshire Coast,” pp. 340-8). 
4. Equorea formosa , described by the author in his paper on the 
" Acalephm of Dublin Coast” {vide “ Nat. Hist. Eev.,” vol. iv., 
p. 245). 
To these may be added a fifth species, first discovered by the author 
in Dublin Bay, and since found by him on several parts of the south¬ 
west coast of Ireland. The umbrella of this Equorea varies in shape, 
being in some specimens almost discoidal, whilst in others it is campa- 
