RHIZOl’ODA. 
637 
4. Leidy, J. Remarks on Protozoa. P. Ac. Philatl. 1874, pp. 13-15. 
. On Actinophrij!^ sol. Tom. cit. pp. 23 Si 24. 
5. . Note on the enemies of Diflugia. Tom. cit. p. 75 ; Am. J. Sci. 
(3) viii. pp. 223 & 224 ; Ann. N. H. (4) xiv. p. 377. 
6. : . Notice of some new fresh-water Rhizopods. P. Ac. Philad. 
1874, pp. 77-79; -Am. J. Sci. (3) viii. pp. 224-226; Ann. N. H. 
(4) xiv. pp. 383-385. 
7. . Notice of a remarkable Amoeba. On the mode in which 
Amoeba swallows its food. P. Ac. Philad. 1874, pp. 142-172 ; Am. 
J. Sci. (3) viii. pp. 155 & 156. 
8. . Notice of some fresh-water and terrestrial Rhizopods. P. Ac. 
Philad. 1874, pp. 86-88; Am.J. Sci. (3) viii. pp. 70-72; Arch. Sci. 
nat. Hi. pp. 166 & 167. 
9. Rymer- Jones, F. W. Owen. On some recent forms of Lagcncn 
from deep-sea soundings in the Java Seas. Tr. L. S. xxx. p. 45-69, 
pi. xix. 
10. Schneider, A. Bemerkungen zur Entwicklungsgeschichte der 
Radiolarien. Z. wiss. Zool. xxiv. pp. 579 & 580. 
11. ScnuLTZE, F. E. Rhizopodenstudien, I. Arch. mikr. Anat. x. pp. 
328-350, pi. xxii. II. L. c. pp. 377-400, pis. xxvi. & xxvii. III. 
op. cit. xi. pp. 94-139, pis. v.-vii. 
12. WiNTHER, O. Fortegnelse over de i Danmark levende Foramini- 
ferer. Nat. Tids. (3) ix. pp. 100-132. 
Distribution. 
Forty-two species of Foraminifera are enumerated (12) from the 
Danish Seas. A great number of RTiizopoda, with few exceptions, all 
from fresh-water in Germany (Bonn, Marburg, Graz, &c.), are described 
by the German authors quoted above (1-3 & 11). Ehrenberg has con- 
tributed to the Report on the 2nd German North Polar Expedition 
(Zweite Deutsche Nordpolarfahrt, ii. pp. 437-467, pis. i.-iv.) a chapter on 
the Microzoa (^Foraminifera, Rhizopoda, Radiolaria, Diatomacea, &c.) of 
the arctic zone, with tables illustrating the bathymetrical distribution of 
the marine and (he geographical distribution of the terrestrial forms. 
Classification y Genera y and Species. 
Under the name of Sarcodina — almost equivalent to the Rhizopoda of 
M. Schultze — IIortwig& Lesser (3) comprise the groups elsewhere spoken 
of as Monera, Amcebinay Heliozoa, and Pohjthalamia. The systomatio 
relations of this great group with other inferior organisms (Radiolaria, 
Mycetozoa, Noctiluca, Flagellata, Catallacta, Ciliata, Acineta, Gregarinoe^, 
the value of the characters employed in classification, and the systems pro- 
posed by modern investigators are elaborately discussed. Leaving aside 
the Foraminifera and several forms, the affinities whereof are dubious 
