DUBLIN xMICROSCOPICAL CLUB. 
117 
bundles, remarkable for the great distinctness with which ‘ Cohn- 
heim’s areas ’ came out on the cross section of the fibres. The 
stratified mucous epithelium was well seen and the submucosa 
was apparently destitute of mucous glands ; the shiny secretion 
which lubricates the tongue being probably the product chiefly 
of the enormous sub maxillary glands. 
Aorta in Bdminants. — Dr. Purser showed specimens of the 
aorta of ruminants, cows and sheep. In these animals the 
muscular tissue of the middle coat does not consist of single 
film or small groups of films equally distributed between the 
elastic plates or membranes, but in parts the elastic plates are 
interrupted £nd the tissue is composed almost altogether of 
muscular fibre, with only a few elastic threads interposed. In 
these muscular patches the fibres run, for the most part, trans- 
versely, but ii some cases obliquely or longitudinally. 
Section of Tillous Tumour. — Dr. Charles Ball exhibited some 
sections of a villous tumour of the rectum, which showed one 
reason why these growths have been so frequently confounded 
with true cacinomata, namely, that in consequence of the nu- 
merous involitions of the superficial epithelium sections would 
present the ippearance of endogenous growths of epithelium, 
while in realty these appearances were due to the section having 
traversed the bottom of superficial sulci. 
Encysted Sate of Vacuolaria virescens^ Cienkowski, exhibited, 
— Mr. Archer showed a condition of this conspicuous flagellate, 
forming in i'self a pretty object, and one which, met with in an 
isolated way had long puzzled him as to what it could be. 
Here, however, were examples of this flagellate partially encysted, 
and others vholly so, the latter still encircled by the original 
cuticular ctA’ering or skin, standmg ofi? as a separate pellicular 
investment. The inner body appeared as a “ spore-like ” struc- 
ture, conteits dense, green, and quite destitute of any vacuolar 
appearance, its bounding wall very thick, and covered by 
a number of large sub hemispherical hyaline prominences. 
This, withoit the cast-ofl’ parent, simply membranous coat, is, as 
has been -*aid, not unlike a possible zygospore of say some 
'desmidian &c., but something always told one it could scarcely 
80 be. E'idently Cienkovvski’s original examples had not gone 
on to th( formation of this thickened and unduly margined 
inner wal, or he would have figured this condition : he repre- 
sents onk a still, smooth, thin-walled condition, not uncommon. 
Indeed i would only be by obtaining examples in several con- 
ditions fiat the connection between the two extremes could be 
Been, liese bodies, apart from their being still surrounded 
simply ly the parent “ cellwvall,” could not be regarded as truly 
“spores’ or, as in any way resulting from conjugation; if they 
were fomed by the union of two individuals, they would have 
been lager ; on the contrary, they appeared rather smaller, but 
more dtise, than the ordinary freely swimming examples. They 
