INFUSORIA. 
511 
and retractile ; mouth at base of neck on left margin ; staff-shaped bodies 
present on left margin of neck. L. folium, WTzes., = Dileptus folium, Duj., 
and Loxophyllum fasciola. Clap. & Lachm. pt. ] L. fasciola, Wrzes., = ^m- 
phileptus fasciola, Ehr., and Loxophyllum fasciola, Clap. & Lachm. pt. ; L. 
varsaviemis, sp. nov., Wrzes. (1. c. p. 602). Subgenus Ilemiophrys, Wrzes. 
(I. c.). The granules and particles of nutriment extend themselves into the 
margins of the body j and the staff-shaped bodies are irregularly distributed 
on the dorsal and ventral surfaces. Litonotus (^Hemiophrys) diaplianus, sp. 
nov. (?); Wrzes. {1. c. p. 603). 
Microthorax pusillus, Engelmann. Wrzesniowski’s examples from the 
neighbourhood of Warsaw differ from Engelmann’s in two insignificant pecu- 
liarities only. In Engelmann’s the body is more pointed in front, and on the 
ventral surface are three longitudinal grooves reaching only to the middle of 
the body. 
Condylostoma {siagnalc, sp. nov., Wrzes., if really different from C. patens, 
Euj.). This is a freshwater Condylostoma, the genus having hitherto been 
found only in salt water. It differs from C. patens in some points ; but the 
author does not venture to set up a new species on the strength of a single 
example. 
Dilcptus gigas. Cams. Wrzesniowski (/. c.) describes two local varieties 
from the neighbourliood of Warsaw — I), gigas grojccensis and D. gigas var- 
saviensis. 
Opalina. Mr. E. Ray Lankester (loc. cit.) describes the general structure 
and especially the contractile vesicles of Opalina naidos, Duj. According to 
the structure of their integument, nucleus, and contractile vesicles the Opa- 
lince are to be considered true Infusoria, and not stages in the development 
of worms ; but Mr. Lankester considers the organisms called by M. Clapa- 
ihde Pachydermon to be annelidan spermatophores. 
Giglioli ( 1. c. p. 491) describes two new species of Noctiluca : the first, 
N. omogenea, Gigl., from the Malay archipelago and Chinese seas, sheds a 
greenish light, wants the internal protoplasmic ramifications, and has its 
filament proportionally much shorter ; the second, N. padfca, Gigl., from 
the Pacific coasts of Australia and South America, shedding a whitish light, 
is larger than N, miliaris, and has, like it, the protoplasmic ramifications, but 
the filament is proportionally much longer and larger. 
Cienkowsky’s researches (/. c.) lead him to the conclusion that the fla- 
gellate genera Chlamydomonas, Euglena, Cryptomonas, Vacuolaria, are natu- 
rally associated with the Palmdlacece. 
Vacuolaria virescens, gen. et sp. nov., Cienk. (I. c. p. 426), from the Saxon 
Switzerland, possesses an oval body of naked protoplasm, coloured greenish 
by chlorophyll- granules, at one end two long flagella, likewise a nucleus, 
and between it and the attachment of the flagella 1-3 pulsating spaces. 
Their ‘^zoospores” encase themselves in a covering of jelly, within which 
they lose their flagella, become spheroidal and multiply by division ; there is, 
lastly, a condition of rest or encystment, in which the nucleus is not visible. 
Colacium stentorinum, Ehr., usually also reckoned a flagellate infusorian, 
agrees also in its course of development mainly with Palmellacem. 
Monas consociata, Fresenius, is referred by Cienkowsky to the genus Pha~ 
lansterium, along with P. intestinum, sp. nov., Cienk. (/. c. p. 429). Both are 
numerous in Germany and Northern Russia. The development of these 
