INFUSORIA. 
Prot. 7 
Heterotriciia. 
Kent (10) recognizes 7 Families in this Order, viz., Bursariidm, Stein, 
Stentoridce, id., Tintinnodce, Claparede & Lachmann, Spirostomidce^ and 
the newly-established Families, lYichodinopsidce, Godonellidce, Calceo- 
lidm. 
Trichonympha agilis, Leidy, figured by J. Leidy, J.. Ac. Philad. viii. 
pi. li. A careful study of its structure, pp. 429-436, leads to the con- 
clusion that it is intermediate between the Gregarinida and Infusoria^ 
but most nearly related to the former. 
Fyrsonymplia vertens, Leidy, figured, id. 1. c. pi. lii. figs. 1-17. Full 
account of its structure and life-history, pp. 436-439. 
Dinenympha gracilis^ Leidy, figured, id. 1. c. pi. lii. figs. 18-26. Pro* 
bably allied to Opalina. 
Holotricha. 
Kent (10) recognizes 13 Families in this Order, viz., Colepidte, Ehren- 
berg, TracheliidoR, id., Opalinidoi^ Stein, and the newly-established Para- 
moiciidcB, Prorodontidce, TrachelophyllidcE, Enchelyidce, Trachelocercidce^ 
IchthyophthiriidcPy Ophryoglenidce, Pleuronemidoi, Lernhidce, Trichonym- 
phidoe. 
ParamcRcium aurelia. The general protoplasm is coloured deeply dur- 
ing life by the aniline colour, Bismarck-brown ; the nucleus generally 
remains uncoloured; L. F. Henneguy, Bull. Soc. Philorc. iv. p. 52. 
Urceolus alenizini, Mereschkowsky, (13) p. 219, pi. xii. fig. 13. 
Phialonema, Stein, = Urceolus, Mereschkowsky, according to the latter 
author, (13) p. 219. The mouth is situated at the bottom of the fossa in 
the neck. 
SUCTORIA. 
Probable mode of action of tentacles of Acinetines described by Mau- 
PAS, (12) p. 302, in connection with Sphcerophrya magna, sp. n. The 
animal attacked probably has its integument perforated by the tentacle, 
and the axial substance o£ the latter penetrates into it, and sets up a cur- 
rent which sweeps the contents of the tentacle of the Acinetine. The 
existence of Acinetines devoid of a true cuticle is proved by observations 
on Podophrya libera and Sphcerophrya magna. 
Maupas, (12) p. 346, concludes that the integument of Hemiophrya, 
Podophrya, Dendrocometes, Dendrosoma, Ophryodendrum, and Trichophrya 
corresponds morphologically to the cell-membrane, but that the capsule 
of Acineta and Solenophrya is skeletal, and of totally different affinities. 
There is no true division of the protoplasm in Acinetines into endosarc 
and ectosarc. The suckers of the Acinetiiioo are tubular ; in some 
species they are simple prolongations of the integument, while in others 
they arise from the deeper parts of the body ; in Hemiophrya micro- 
soma the prehensile tentacles arise in the one way, aud the sucking 
ones in the other. The tentacles are homologous with the pseudopodia 
of Rhizopoda, being precisely like them in structure aud mode of origin. 
A nucleolus external to the nucleus occurs in Acineta fcetida and Podo- 
phrya limbata. The nucleus may differ from the ordinary type in being 
