INFUSORIA. 
Prot, 3 
Choitonpira^ Lachmann, and Sfichochceta, Clap. & Laohm., (2) p. 450, = 
Stichotriclia, Perty. 
Lacrymaria lagenula^ Clap. & Lach., (1) ii. p. 233, iii. p. 47, pi. ix. 
figs. 1-4 ; in saltpan, Hungary. 
Placus striatus, Cohn? (1) ii. p. 233, iii. pp. 46 & 70, pi. viii. fig. 7 ; in 
saltpan, Hungary. Probably is a young form of Acineta tuberosa, pro- 
vided with a mouth. 
Litonotus fascicola, Ehrenberg, (1) ii. p. 226, iii. p. 39, pi. viii. figs. 3-6. 
The two nuclei are often, probably always, connected by a filament. 
Conjugation observed. In saltpan, Hungary. 
Enchelys, (1) iii. p. .50, re-characterized. 
Enchelys gigas, Stein. (1) iii. p. 60, = E. spathula, Muller. 
Enchelys nehulosa, Ehrb., (1) ii. p. 236, iii. p. 60 ; in saltpan, Hungary. 
Opalina ranarum, described from Discoglossus pictus, hy 'Everts, Tijdschr. 
Ned. Dierk. Ver. iv. p. 95. 
A Nyclotlieriis, 3 Balantidia, and 4 Opalime enumerated from intestines 
of 3 Batrachians, by E. Maupas, C. R. Ixxxviii. p. 921. 
Ophryodendrum, (3) p. 539. Its nearest ally is Acinetopsis, g. n., vide 
infra. 
Ophryodendrum ahietinum, Claparede & Lachmann, (3) p. 630, figs. 1-7 ; 
most often found on Sertularia. Structure and physiology described. 
No trichocysts observed. The tentacle is composed of a ribbon-like axis 
and a loose integument ; the cirri are of a homogeneous hyaline sub- 
stance ; neither they nor the tentacle transmit any food particles through 
their substance. The worm -like parasi te observed on it by Wright is not 
a Gregarina. 
Podophrya gemmiparay R. Hertwig, = P. lynghii, Clap. & Lachm., (3) 
p. 542, pi. xl. figs. 14-30. Development takes place in two ways, as 
observed by Hertwig: when by externally-produced ciliated buds, these 
buds discontinue their free condition, lose their cilia, become applied to 
some surface by the lower part of the body, first develop suckers on the 
upper surface, and then a pedicel at the opposite part ; non-ciliated buds 
aie also developed externally among the suckers of the parent, and 
assume its shape before being cast off. 
Podophrya lynghii, Ehrb., Bull. Ac. Belg. (2) xlv. p. 247, pi. iii. 
Podophrya conipes, Mereschkowsky P, in cavities of eaten-out Salpce 
mentioned by Haller, Z. wiss. Zool. xxxiii. p. 395. 
Acineta: relations to Podophrya, &c. ; (3) p. 561. 
Acineta tuherosa, Ehrenberg, (1) ii. p. 246, iii. p. 60, pi. x. figs. 4-13. 
Different tentacles may bo simultaneously employed in sucking various 
prey. Solid particles may be taken into the body through tentacles, 
which in this process contract to a mere wart. Development described ; 
two distinct forms of embryos occur, one wholly ciliated, the other with 
four or five bands of cilia. Probably many of the Enchelynm and Tra- 
chelincE are merely stages in the development of Acinetce. 
Acineta tuherosa, Ehrb., Bull. Ac. Belg. (2) xlv. p. 247, pi. iii. 
Acineta tuherosa, (3) p. 558, figs, 11-13 ; A. patula, 1. c. p. 559, figs. 9 
& 10; Acineta sp. P, 1. c. p. 560. 
