436 Some New Infusoria. [May, 
the animalcules must therefore demand admission to the Flagel- 
lata-Eustomata of Saville Kent. The indurated character of the 
cuticular surface and the presence of green particles, apparently 
of food, within the endoplasm, would indicate the existence of a 
special mouth which would also be indirectly suggested by the 
appearance of the anal opening. The place of the genus in a 
systemic arrangement would therefore probably be, not in the 
neighborhood of Colponema but near Dujardin’s Anisonema, 
differing from the latter, so far as the flagella are concerned, in 
having the shorter the trailing one, and the longer the vibratile, 
the converse of this being characteristic of Anisonema. 
In the infusion a third species of Notosolenus has appeared. 
_ It is much depressed and almost triangular in form, the sloping 
sides being somewhat concave or undulate, and the truncate pos- 
terior extremity more or less emarginate, this emargination in 
some individuals increasing to a strongly marked concavity. Fig. 
2 represents the creature in its ventral aspect with the extremity 
moderately uneven, and Fig. 3 another individual with a con- 
Fig. 3: 
Fic. 2.—Wotosolenus sinuatus, sp. nov., ventral, FIG. 3.—/. sinuatus, emarginate 
form, ventral. 
spicuous emargination. Its endoplasm is very bright and transpa- 
rent, being obscured only in the posterior part by granules and 
food particles. Its movement is forward in an almost direct 
_ course, the body elevated, the anterior apex in contact with the 
slide, the long flagellum held stiffly and obliquely in advance, its 
free end only vibrating, while the short flagellum, which appears 
_ to be of but little practical advantage to its owner, trails almost 
_ motionless below or above, for whether the animalcule shall float 
with the dorsal surface upward or beneath seems immaterial. It 
