A. C. Stokes—Fresh-water Infusovia. 323 
than the extremity of the lorica, where it is apparently widened 
and continued through the thickened wall as a longitudinally 
stnate prolongation or footstalk to the enclgsed zooid; extend- 
ed animalcule obconical, protruding but a short distance be- 
yond the lorica, the cuticular surface transversely striate and 
bearing near its middle a narrow, transverse ring-like elevation 
or ridge, Length of Jorica zty inch; greatest width >;4,; 
breadth of aperture, <sov- Habitat.—Pond water; on Myrio- 
phyllum, 
The enclosed animalcule here differs from all hitherto known 
Species in the possession of a transversely striated cuticular 
sirface, and the ridge-like elevation encircling the central por- 
lion of the body. These points alone are sufficient for diagno- 
Sis, although the lorica also differs in form from that of any 
Previously described member of the genus. This with the ex- 
tended animaleule are shown in g. 
Habitat.—Pond water; among Myriophyllam. _ 
n form this resembles Litonotus Wrzesniowskit S.-K., but is 
undoubtedly distinct. The relative and proportionate length 
of tail and extensile neck to each other and to the central 
dy, and the form of the caudal prolongation are very con- 
‘picuously different from that of the species dedicated to the 
Russian naturalist; and the trichocysts, instead of being 
arranged in a regular row at the border of the neck and 
obliquely directed, are scattered in no apparent order through- 
Out the cortical layer of the central body and at the tip of the 
: This portion of the internal struc- 
The chief diagnostic characters, how- 
€ver, in the internal structure, are the presence 
