322 A. C. Stokes—Fresh-water Infusoria. 
to the length. 
Reproduction takes place by transverse fission probably fol- 
lowing conjugation, as individuals have been repeatedly ob- 
tained in the latter condition, the union, as observed, being 
effected by the mutual adhesion of the peristome fields through: 
out their entire length. The free-swimming infusorian 1s rep- 
fig. 12 
resented in fig. 12. 
Vaginicola leptesoma, sp. nov. 
Lorica subcylindrical, three and one-half to four times as long 
as broad, slightly inflated centrally, thence rapidly tapering to 
the narrow, truncated base of attachment, the lateral borders oO 
the posterior portion often undulate, the circular anterior mal 
gin not everted; animalcule attached to the lorica by a short 
pedicle, the extended body narrowly elongate-conical, project: 
ing for from one-third to one-half of its entire length beyond 
the lorica border, the cuticular surface finely striate transverse 
ly; nucleus elongate, band-like. Length of lorica fq inch. 
Habitat.—Pond water; attached to Alge. 
The lorica in form resembles that of Vaginicola attenuata 
(From.) S.-K., but is just twice as large, besides differing 
the proportion borne by the length to the width. The con- 
tracted body of V. atlenuata is described as urn-shaped ; the 
present species when in that condition is simply obovate. The 
surface of the former is smooth. The cuticular striations of Val 
leptosoma are distinctly marked. This ornamentation of the sur 
face has not been observed on any of the previously known 
species. The nucleus is remarkably elongate, extendin 
through nearly the entire length of the body. The lorica 4” 
extended animalcule are shown in fig. 13. 
Cothurnia annulata, sp. nov. 
to the pedicle and often undulate, the posterior margin cone 
uously thickened at the point of attachment to the foot-stalk, 
the anterior three-fourths, tapering to the circular, truncas” 
margin, which is not everted; pedicle short, slightly narrower : 
