THM NUMATOOYSTS OF TURBMEDAIIA, 271 
I have only oneo found ripe fomale Microstoma im Loch 
Lomond towards the middle of September, but the material 
which | then obtained was unfortunately lost,  MWven if, howe 
over, this difficulty is overcome, 1 do not believe that trust. 
worthy results can be obtained by this method, 
l have-found very young Microstoma in which nomatooy sts 
wore alréady present, and at first this presented a difficulty 
bo this theory of the derivahion of nematocyats, bub LT do not 
holiove this is insuperable when we consider that nomatocysb 
in the case of an animal which has fed largely on Tydra ean 
bo found in almost-any tissue of the body, IT have found 
them in tho tostes (fig. 8), and although [ have not yet 
found them in an ovum, [believe that the yolkecolla might 
roadily carry the nomatocysata mto the cocoon thus causing 
the infection of the young forma, 
Microstoma piganteumThis form was deseribed by 
Halloz, and according to von Gralf, the only details given an 
to the nematocyasatsa are that they are larger and more 
numerous, ; 
Microstoma rubromaculatum,.This form has only 
twice beer found by von Graff in the Bay of Naples, In his 
doseription he says, “Stibehen fehlen; der Haut dagegon 
eonthilt dieselbe Gruppen minutidser ovalor, starklicht- 
brechonder Korperchen von 0°008 mm, Broite und 0007 
Liinge (fig. 16), die ich nach ihrer Ansicht von oben (a) und 
von der Seite (b), fir Nesselkapseln mit eimposchlossenen 
kurzon Vaden halten muss,” 
l found this form on one occasion ab Naples on some weed 
from the Mergellina, In the form which | examined there 
wore large cella seattored in the epidermis contaming minute 
rods which stain very readily with eosin, here were also a 
fow amall oval nematocysts, 
Microstoma papillosum, von GrafLeA single example 
of this form was found by Claparéde at Barteros, on the 
coast of Norway, and figured by him as a Dendrocosl larva. 
The animal measured '3 mm, long, and he says nothing of 
nematocysts, though he figures the long rhabdites, In the 
