INFUSORIA. 
Prot. 5 
studied by A. Certes. The genus should not bo classed among the 
mouthless Opalinm, but near Balantidium. 
Dendrosoma radians. Habits and physiology, testes, spermatozoa, 
ovaries, and ova described ; it produces free internal ciliated embryoes. 
J. Levick, Tr. Birmingh. Soc. 1880, p. 1, pis. i. & ii. , 
Trichophrya epistylidis^ Claparede & Lachmann, J. R. Micr. Soc. iii. 
p. 561, pi. xiv. fig. 1. According to Badcock’s observations, 1. c., this 
species is only an early stage of Podophrya quadripartita^ pi. xiv. figs. 2-5; 
Megatricha pa,rtita is probably of a similar nature, fora form correspond- 
ing to it in structure developes into P. quadripartita. 
Acinetccy W. G. Cocks on stages of; Sci. Gos. xvi. pp. 79 & 155, figs. 51 
& 52. 
Acinetm attached to Epistylis and to Carchesium polypinum ; id. tom. 
cit. p. 79. They seem to this 'writer to be more than mere stages of 
Peritrichous Infusoria. 
Podophyra Jixa^ development of; id. tom. cit. p. 155, figs. 88-91. 
New Species. 
OpUrydium adoi, Evarts, Am. Micr. J. i. p. i. figs. 1-5, Philadelphia, » 
U.S. Also found by “ D. S. K.” in the Niagara River, Buffalo ; tom. cit. 
p. 218. Has a long cord-like endoplast. 
Stentor amethystinus, Leidy, P. Ac. Philad. 1880, p. 157, Woodbridge, 
New Jersey. 
Haptophrya tritonis, Certes, Bull. Soc. Zool. iv. p. 242, intestine of 
Triton alpestre^ Bonn. 
Podophrya ? infundihulifera^ Hartog, P. Manch. Soc. xix. p. 41. On 
Cyclops gigas. The tentacles are thick, obtuse, and without terminal 
dilatations. 
Anatomy and Physiology. 
Engelmann, (2) p. 507, pi. v. fig. 1, finds in Carchesium polypinum a 
circular band of refractive substance, which is closely connected with the 
ectoplasm, and in which the posterior circle of cilia are implanted ; this 
band is very finely and regularly striated in two different directions by 
two sets of parallel lines, running, the one at an angle of 60^^ to the long 
axis of the animal, the other at an angle of 100° to the first set ; by their 
intersection these lines break up the band into minute roundish areas or 
granules, from each of which springs a cilium ; these granules represent 
the small bacillar pedestals in which the cilia of many ciliated cells'of 
Vertehrata are implanted. 
The same author, 1. c. p. 522, has searched in Ciliated Infusoria for the 
protoplasmic intra-cellular prolongations of the cilia which he has found 
in Vertebrate cells, but has found them apparently represented only in 
Btylonychia mytilus. Hero each of the stout infero-lateral so-called cilia 
has a very fine pale line proceeding from its base towards the middle of 
the body in a direction parallel to the ventral surface. These stout 
composite so-called cilia have no pedicle like that of ordinary cilia, and 
their intracellular prolongations differ in like manner from those of 
ciliated cells. 
