32 
Transactions of the Society. 
the right side (left in the figure), and a thicker striated fold projects 
into it on the left side.” In my specimens I was not able to make 
out this vertical fold on the right side, though there was a distinct 
flap along the left border of the peristomial field, and this flap 
bore fine cilia along its free edge in the prominent anterior portion 
only. The cavity of the peristome is the entire area enclosed 
between the two cross striated lines curving backwards from the 
anterior margin of the body, and not merely the space enclosed 
between the so-called peristomial bands (represented dark in the 
figure as reproduced by Hickson). It is unfortunate that in inter- 
preting the figure and making the above observations relating to 
it I have not had access to the original monograph of Schuberg. 
One specimen contained about forty or more small ciliate 
organisms very much like the supposed young ones observed by 
Stein. As observed by that writer the specimen was so full of 
these organisms that all trace of peristome was obliterated. The 
specimen after proper fixation showed a portion of the elongated 
band-like meganucleus. The existence of a band-like nucleus side 
by side with the presence of the ciliated organisms, according to 
Kent, “justifies a doubt as to whether or not the so-called embryos 
were parasitic organisms, aud more especially since their further 
development into typical Bursarise was not traced by Stein.” I 
also was not able to trace their development, and so cannot settle 
this disputed point. In a second specimen in which ciliate 
organisms were present, owing to partial evaporation of water and 
consequent pressure of the cover-slip, the animal showed difflruence, 
and some of these ciliate organisms were extruded from its body. 
A portion of the body protoplasm also flowed out, but remained 
connected with the body by a thread-like connexion. On re- 
plenishing the water under the cover-slip a sort of regeneration 
took place ; the cilia of the animal went on working for an hour, 
when it was a complete animal again, though much distorted in 
form. 
Family Stentorina Stein. 
Genus Stentor Oken. 
Stentor polymorphus Muller sp. 
I have several times come across specimens of Stentor from 
small ponds near the River Ravi, and have seen them both singly 
and in the social condition. The specimens have always belonged 
to the colourless variety {Stentor mulleri of Ehrenberg). The 
presence of the moniliform nucleus, the absence of the gelatinous 
lorica, the hair-like bristles along the margins of the body, and 
the circlet of finer setae at the posterior extremity enable it to be 
referred to S. joolymorphus. 
