THE GENERAL SUBJECT, INFUSORIA. *Prot, 2 
II. Animals living singly or united after a fashion differing from the 
above. 
1. Possessing the power of extending pseudopodia. — Class iii. 
Rhizopoda. 
2. Power of extending pseudopodia absent. 
i. Locomotor organs in form of cilia or contractile threads. — 
Class ii. Infusoria. 
ii. Locomotor organs entirely wanting. — Class i. (iregarinidm. 
Abundant woodcuts are given, illustrating the chief types which have 
been referred to the sub-kingdom, with their anatomy in many cases, e.gr., 
especially, Spongia adriatica, Schmidt. 
In a Classification of the Animal Kingdom, at p. 375 of “ The Ancient 
Life History of the Earth” (Edinburgh and London : 1877 ), the sub- 
kingdom Protozoa is divided by H. A. Nicholson into — 
Class I. Gregarinidce. 
Class II. Rhizopoda. 
Order 1. Monera. 
„ 2. Amcsbea. 
„ 3. Foraminifera. 
„ 4. Radiolaria. 
„ 5. Spongida. 
Class III. Infusoria. 
W. S. Kent, Ann. N. H. (6) i. p. 1, classifies Protozoa as 
I. Holostomata {Rhizopoda^ &c.). 
II. Polystomata {Acinetina'). 
III. Discostomata. 
(1) Discostomata gymnozoida (Collar-bearing Monads), (2) Disco- 
stomata sarcocrypta (Sponges). 
IV. Mono- or Eu-stomata (Ciliate and flagellate stomatode Infusoria). 
C. VON Mereschkowsky claims (4), p. 223 et seq., to have disproved 
the instability of Protozoan types and the belief that Protozoan faunae 
diverge but slightly. The marine Protozoa of different districts diverge 
more than the freshwater forms, which he attributes to the distribution 
of the dried encysted forms of the latter by wind. 
E. Haeckel, “ Das Protistenreich,” Kosmos, iii. pp. 10, 105, & 215, with 
woodcuts, gives a full account of the kingdom Protista^ and describes and 
figures some of the principal species of the Catallacta^ Monera^ and 
Rhizopoda. 
E. L. Moss has a preliminary notice of the surface fauna of the Arctic 
Seas in J. L. S. xiv. p. 122, relating to Protozoa. 
Note. — The name of the author of paper (10) of Protozoa in the Zool. 
Rc. for 877. should have been Grimm, not Grbmma. 
INFUSORIA. 
Chief Works relating to : — 
1. Engelmann, T. W. I. Zur Physiologie der contractilen Vacuolen 
der Infusionthiere. Zool. Anz. i. p. 121. 
