DUBLIN MICROSCOPICAL CLUB. 201 
Dustin MicroscoricaL CLvus. 
19th November, 1874. 
Heterostegina Australis and Antenna of Miris murarius, exhibited. 
—Dr. Macalister exhibited a section of Heterostegina Australis 
and drew attention to its structure, showing the peculiar camera- 
tion of that genus, and the characteristic stolon canals. He also 
showed the antenne of the heteropterous insect Airis murarius 
(Fam. Capside), presenting the ten-jointed elliptical extremities 
characteristic of the species. 
Navicula Kittoniana, n.s. O'M., and new Cyclotella, C. papillosa, 
n.s. O’M., exhibited Rev. E. O’ Meara exhibited a form of Vavicula 
found by him in a gathering made lately at Lough Neagh, near 
Lurgan, and which he considered undescribed. The following is a 
description :—L. of Fr., ‘0080"; greatest br. of the valve on S8.V., 
0008"; slightly inflexed at the middle, where the br. is ‘00075 ; 
ends abruptly rounded; central nodule large and prominent; 
median line well defined, slightly undulate; at either side of the 
median line is a broad unstriate space, considerably expanded 
around the central nodule; transverse strie linear, fine, parallel; 
longitudinal striz easily detected. The species he proposed to 
name Navicula Kittoniana.—Mr. O’Meara also showed from the 
same gathering a form of Cyclotella which he considerd not de- 
scribed, at least satisfactorily :—-Marginal striz on the valve very 
fine ; central portion unstriate, and occupied by a circlet of papille 
usually 5—6 in number. He considered it not unlikely that this 
form may be identical with one of the many varieties described by 
Ehrenberg, as Discoplea atmospherica, from Nepal (‘Micr.,’ xxxii, v, 
f. 4,also, from ‘ Fagun Egypt,’ t. xxxuj, i, f. 3), but as the figures 
differ so widely from one another, even if there were no doubt of 
the identity, a distinct name is required to mark the peculiar 
character of the species, which he (Mr. O’Meara) proposed to 
designate Cyclotella papillosa. 
Muscle Fibre and Fibre-cells exhibited —Myr. B. Wills Richardson 
exhibited two mountings in glycerine gum of organic muscle fibres 
and fibre-cells—one from the stomach of the ox, and the other 
similar structure from the human stomach at birth. The fibres and 
cells were stained with the bluish-grey which Mr. Richardson had de- 
scribed in the ‘ Quarterly Journal of Micr. Se.’ for July, 1874. 
OCyathus crucibulum, Hoff., exhibited—Dr. Moore showed ex- 
amples of Cyathus crucibulum, Hoff.=Nidularia crucibulum, 
Persoon,—the cups filled with sporangia attached by their elastic 
pedicels forming a very pretty low-power object. 
Xenodochus carbonarius.—My. Greenwood Pim, jun., showed 
examples of the rare Xenodochus carbonarius from leaves of San- 
guisorba ; from the neighbourhood of Liverpool the moniliform 
chains formed by the plant he had detached and mounted, forming 
an exceedingly pretty object. 
