613 
PROTOZOA. 
organisms points to a close relationship with the PalmellaceoK j but the capa- 
bility of the zoospores to take in solid nutriment leads us on the other hand 
towards the animal kingdom. 
CiENKOWSKi describes, lastly, two other monad-like organisms whose de- 
velopment no longer accords with that of Palmellace<^, but is remarkable for 
a peculiar internal cyst-formation. 
Spumella vulgaris^ gen. et sp. nov., Cienk. (/. c. p. 433). Zoospores colour- 
less, globular or oval, attached by a stalk, and at the opposite pole provided 
with one long flagellum and two smaller ones on each side of the larger ; a 
nucleus and one or two pulsating spaces. Solid nutriment taken in always 
at the base of the large cilium. Multiplies by division, also by budding. 
Encysting process peculiar, in that the cyst, globular with a little neck, arises 
inside the still moving zoospore. 
Chromidina nebulosa, gen. et sp. nov., Cienk. (/. c. p. 435). Zoospores living 
associated in cloudy masses surrounding submerged objects, each egg-shaped, 
with one flagellum at the smaller end ; a yellowish plate passes through the 
protoplasm body, from the attachment of the flagellum, along the wall, to 
about the middle, and then passes right across to the opposite side, where 
it again directs itself downwards. Pulsating spaces one or two. Ingestion 
of solid matters not observed. Cyst-formation internal j cyst globular, Avith 
a small neck. From peat-moss pools in Northern Russia. 
CiENKOAVSKi (/. c. p. 436) tlius analyses the so-called Flagellata : — 
1. Monads, including those forms without nucleus (MonerUj Hiickel). 
2. Palmellaceous Flagellata. Ex. Euglena, &c. 
3. Flagellata with internal cyst-formation Cienk.). Ex. Chro- 
mulina, Spumella. 
RHIZOPODA (including Monera) . 
Allman, G. J. Note on Polytrema miniacea. Ann. N. II. (4) 
V. pp. 373, 373. 
Archer, W. On some Freshwater Rhizopoda, new or little 
known. Q. J. Micr. Sc. 1870, pp. 17-34, 103-134. 
This forms the conclusion of Mr. Archer’s First Fasciculus ” on Fresh- 
water Rhizopoda, the new ‘’genera and species of which have been already 
noticed in Zool. Rec. vi. pp. 681-683. The present parts are principally 
occupied with the establishment of definite generic and specific characters 
for the Rhizopoda described, and with a review of the recent works of 
Greelf, Grenacher, and other authors on similar subjects. 
. On some Fi’eshwater Rhizopoda, new or little known. 
Faseiculus ii. Proc. R. Irish Ac. Dec. 1870. 
Contains descriptions of Ampkizonella vestita, sp. nov., Acanthocystis spini- 
fera, Greeff, and Plagiophrys sphcerica, Clap, et Lachm. 
Brady, H. B., Parker, W. K., & Jones, T. R. A Mono- 
graph of the genus Polymorphina. Tr. L. Soc. xxvii. 1870, 
pp. 197-353. 
