A. C. Stokes—Fresh-water Infusoria. 325. 
Litonotus trichocystus, sp. nov. 
: Body elongate-lanceolate, flexible and extensile, six to eight 
times as long as i 
oad, widest centrally, slightly geen 
toward the anterior extremity which is somewhat cur 
to the right hand and depressed, but not conspicuously 
the posterior extremity; trichocysts large, numerous, princi- 
pally confined to the anterior body-half and the posterior 
extremity, in the former being arranged in an obliquely: 
directed ‘series along the left-hand border, a cluster at the 
Xamined in dorsal or ventral optical section this infusorian 
‘0a certain extent resembles Litonotus fasciola (Ehr.) S.- It 
Is, however, easily distinguishable by its shorter and less con- 
*Picuously flattened neck-like part, and especially by the num- 
rand arrangement of the trichocysts, which are constant and 
will constitute the chief structural character, aside from con- 
tour, by which the animalcule may be readily identified. It is 
delineated in its extended state in fig. 17. When contracted it 
becomes broadly lanceolate. 
Chilodon fluviatilis, sp. nov. 
Body irregularly ovate, one and one-half times as long as 
broad, widest and rounded posteriorly, the left-hand lateral 
