12 FroL 
PROTOZOA. 
19. [Brandt, K.]' UntersuchungenanRadiolarien. MB. Ak. Berl., 1881, 
p. 388, 2 plates. 
Studies on the synonymy, morphology, development, and pathology, 
chiefly of the Sphceroidece. The “ yellow cells ” are especially dealt with. 
20. Butschli, 0. Protozoa in H. G-. Bronn’s Klasson und Ordnungen 
des Thier-reichs. Leipzig & Heidelberg [see Zool. Bee. xvii.] : 
parts 8 & 9, pp. 225-320 [plates xiii. to xvi., published in 1880, refer 
to these sections]. 
Completes the account of the Rhizopoda, s. str., with an account of 
their geographical distribution, and of the chief fossil forms [the latter 
subject undertaken by C. Schwager], and commences the consideration 
of the Ileliozoa with a description of their general structure and physi- 
ology as determined up to the present time. 
21. . Beitrage zur Kenntniss der Badiolarienskelette, insbesondere 
der der Cyrtida. Z. wiss. Zool. xxxvi. p. 485, pis. xxxi.-xxxiii. 
Chiefly the result of study of fossil forms from the Barbados Tripoli 
deposits. The systematic relations of the genera and families are con- 
sidered, and many species figured in illustration. 
22. Gruber, A. Der Theilungsvorgang bei Eaghjplia alveolata. Z. wiss. 
Zool. xxxv; p. 431, pi. xxiii. 
23. . Die Theiluug der monothalamen Rhizopoden. Z. wiss. Zool. 
xxxvi. p. 104, pis. iv. & v. 
Argues in favour of the wide-spread occurrence of the fission method 
of reproduction in these forms, contending that it has been mistaken for 
copulation, and endeavours to show how the difficulties attending the 
process are overcome in forms which have a test, e.e., by various modifi- 
cations of the simple process. He concludes fission, in the form of 
cell-division, to be the only manner in which the Thalamophora are repro- 
duced. 
24. — — . Dtmoipha mutans. Eine Mischforme von Flagellaten und 
Heliozoen. Z. wiss. Zool. xxxvi. p. 445, pi. xxix. 
25. . Beitrage zur Kenntniss der Amoeben. Z, wiss. Zool. xxxvi. 
p. 459, pi. xxx. 
26. Hacked, E. Entwurf eines Radiolarien-Systems auf Grund von 
Studien der ‘ Challenger ’-Radiolarien. Jen. Z. Nat. xv. pp. 418-472. 
This paper, giving Latin diagnoses of the Orders, Families, Sub- 
families, and minor divisions down to genera, of the Radiolaria^ is a 
prodromus of anew classification arising out of the results of the ‘ Chal- 
lenger ’ Expedition, and cannot be fully abstracted here. See below for 
the outlines. Hackel finds the same mixture of constant and variable 
species here as in other classes of the Animal Kingdom. 
27. Vejdovsky, F. Ueber die Rhizopoden der Brunnenwasser Drag’s. 
SB. bohm. Ges. 1880, p. 136. 
Gives a list of 16 named species, describing 1 new and an alleged new 
genus. 
