PROCEEDINGS OF SOCIETIES. 181 
number of minute Helices and Bithinie, from under stones on 
the borders of a pond, and had been overlooked as small shells 
allied to Valvata. A microscopical examination, however, not 
only at once showed that they belonged to the genus Helico- 
psyche, of Bremi, but likewise made apparent the dried-up thorax 
and limbs of the insect. At present, Dr. Wright knew of but 
two species of this genus, H. Shuttleworthii, Bremi, from Corsica 
and Como, and H. minima, Bremi, from Porto Rico, which they 
resembled ; and, looking at the differences in the localities of these 
two species and of the one he now exhibited, he believed it would 
be found that these helicine cases belonged to a different phry- 
ganidous insect, to which he would venture to give the provisional 
name of H. Sieboldiz, after the distinguished Professor of Zoology 
at Munich. Dr. Wright had not, however, been enabled to con- 
sult Dr. Hagen’s paper in the Stettin’s Entomological Society’s 
Proceedings. 
Mr. Archer exhibited specimens, obtained from Yorkshire (near 
Market-Weighton), through the kindness of Professor Gagliardi, 
at present resident there, of Closteriwm aciculare, West. This 
elegant form seems to be rare; he (Mr. Archer) had only once 
met with it in Ireland, in a collection made by Mr.’ Porte in the 
King’s County. These specimens, however, were not so very 
long, in proportion to their extreme slenderness, as the original 
specimens described by Mr. Tuffen West; hence Mr. Archer 
sent some on that occasion to that gentleman, who kindly informed 
him that the Irish specimens were truly his ©. aciculare. The 
specimens now exhibited seemed to Mr. Archer quite to agree 
with those he had previously seen. 
In the same Yorkshire gathering Mr. Archer drew attention 
likewise to some specimens of Gonatozygon Ralfsti, De Bary 
(= Docidium asperum, Ralfs), in which the characteristic _super- 
ficial roughnesses were the least evident he had ever seen. Indeed, 
at first glance one would have thought them absent; but a closer 
examination revealed their existence, and the comparatively smooth 
appearance of the surface seemed to be due to the pellucid cha- 
racter of the minute granules, but they were probably also less 
elevated than usual. There could not, however, be a doubt as to 
the identity of the plant. 
Mr. Porte exhibited a gold-fish having a large patch of Sapro- 
legnia growing upon its side, and which stood out, perhaps, three- 
quarters of an inch. This proved to be in the state of developing 
the zoospores, some of which were discharged, others just dis- 
charging, and some with the secondary or tertiary sporangia 
formed one within the other, thus identifying the genus. This 
growth had manifested itself upon the side of the fish where it 
had met with an accidental injury, thus indicating that its pre- 
sence was a consequence, not the cause, of disease. 
Mr. Archer showed specimens of Cosmarium quadratum, in allu- 
