10 Prot. 
PROTOZOA. 
Ophrydium versatile, E., (31) p. 298, pi. xx. figs. 6-11, pi. xxi. figs. 1-20. 
A green and a colourless variety distinguished ; the “ transverse ribs ’’ 
are merely swellings of outer parenchyma ; individuals have separate 
capsules ; colonies formed by meeting of individuals. 
Ejpistylis jjUcatilis, E., (30). Nucleus reformed, after reproduction, by 
portions of old nuclei : some large globules found among the small seg- 
mentation spheres. 
JEj. flavicans, E., (31) p. 281, pi. xx. figs. 1-4. Differs from Greef’s 
description ; no digestive cavity made out. E. grandis is a later stage 
of it. 
Zoothamnium arhuscula, (31) p. 292, pi. xix. fig. 20. Stalk-muscle of 
fine fibrils; its two branches act differently from each other under polarized 
light. 
Oxytricha fallax and Stylonychia pustulata (30). The dark spheres 
fv)rraed after copulation are probably endoplasmic formations. The 
former is subject to parasites in the nucleus (vide infra, under Anatomy, 
&c.) 
Anoplophyra lumhrici (29). Found in Enchytrceus socialis. 
A. (formerly Leucophrys) clavata and cochleariformis (29) in two 
species of Lumhriculus. 
A, intestinalia, St., (32) p. 370, pi. xxiv. figs. 40-45. Referred to 
Opalina, and called 0. similia [1], 
Nyctotherus cordiformis, (32) p. 375. Development much as in 
Opalina. 
Balantidium, (32) p. 375. No cysts. 
Opalina ranarum, Prk. & Yah, ()}2) p. 353, pi. xxiii. Development 
by fission, encystation, emergence (often with several nuclei, which give 
place to one), subdivision of nucleus to form the large ultimate number ; 
fission is sometimes arrested, and renewed growth takes place. 
0. obtrigona, St., (32) p. 365, pi. xxiv. figs. 27-31. Development in 
exactly the same stages as preceding. 
0. dimidiata, St., (32) p. 367, pi. xxiv. figs. 32-37. Development 
essentially the same ; it is accompanied by a broader and thicker form 
(p. 368, pi. xxix. figs. 38 & 39), perhaps a new species. 
Dendrocometes paradoxus, (25) p. 49, pi. vi. The basal surface has a 
thin plate, perhaps equivalent to the pedicel of other Aciuetines j the arms 
are body-processes, containing body-granules and fibrils, t)ie tips appa- 
rently perforated by canals ; there is an efferent tube to the contractile 
vacuole ; the bud is formed from the plasma, afterwards lies in a cavity 
with a duct, and remains connected with mother for a time by a thread. 
Cf also (31) p. 270, pi. xix. figs. 3-6. Tubular ending of arm-fingers, 
used to enclose Infusoria. 
Acineta hyphydri, St., (31) p. 268, pi. xix. figs. 7-9. Excretory tube to 
contractile vacuole. 
A. myatacina (26). Apparently contains a ‘‘ vestibulum” beneath the 
cuticle, which receives contents of contractile vacuole by small openings. 
Urnula epistylidis, 01. & L., (31) p. 267, pi. xix. fig. 1. Referred to 
the Acinetidve by its tentacle-characters. 
