190 
A SUCCESSFUL POND HUNT. 
the sheep or cattle devour with the grass. I did not find a 
single specimen then, but have since found in a pool on a 
neighbouring farm an abundance of Limnaia stagnalis, with 
quantities of that same Cercaria which I have shown before 
as parasites of this snail, and of which I have given a sketch 
in my Portfolio, No. 6. 
At the time I issued that sketch I was under the impres¬ 
sion that this was the Cercaria of the sheep fluke, Fasciola 
hepatica, but Mr. A. P. Thomas, in his exhaustive account of 
the life-history of this parasite in the “ Quarterly Journal of 
Microscopical Science” (January, 18S8), states that that 
species cannot exist in Limncca stagnalis, and that its usual 
host is a much smaller species, Limncca truncatula. 
On comparison of my sketch with Mr. Thomas's figures 
they will be found to differ, I think, sufficiently to suggest 
that this is another species, and it would be well if some one 
would work out its life history, as it is quite possible that the 
Cercaria from Limncca stagnalis may be the larval form of the 
fluke of the cattle. 
LIST OF ORGANISMS COLLECTED. 
Nitella fiexilis (in fructifica¬ 
tion). 
Spirogyra (in conjugation). 
Bulbocliaete. 
Yolvox globator. 
Uroglena AMlvox. 
Phalansterium digitatum. 
Vorticelke (various). 
Carcliesium polypinum. 
Epistylis grandis. 
Stentor coeruleus. 
Cotliurnia imberbis. 
Vaginicola tincta. 
Tlmricola valvata. 
Platycola decumbens. 
Peridinium tabulatum. 
Amphileptus meleagris. 
Clnetogaster diaplianus. 
Nais-? 
ROTIFER A. 
Cluetonotus larus. 
Floscularia cornuta. 
F. longicaudata. 
Stephanoceros Eichhornii. 
Melicerta ringens. 
Cephalosiphon limnias. 
Notommata parasita. 
Rhinops vitrea. 
Triarthra longiseta. 
Mastigocerca carinata. 
Metopidia acuminata. 
Euchlanis triquetra. 
Salpina mucronata. 
Rotifer macrurus. 
Philodina megalotrocha. 
Tardigrada. 
Plumatella repens (emerging 
from the statoblast). 
Morchella semilibera, DC.—This somewhat rare fungus was 
gathered at Eaton Constantine, near Shrewsbury, by Mr. W. E. 
Beckwith, in the beginning of May last. This is the first record of 
its occurrence in Shropshire.—W. Phillips, Shrewsbury. 
