6 Prot, 
PROTOZOA. 
Classification. 
Huxley (13) divides the Protozoa into 
I. Monera (no nucleus). 
n. Endoplastica (distinct internal nucleus). 
He also distinguishes different forms as either “ Myxopod ” or “ Mas- 
tigopod” 
Wallich (24) repeats his 1865 Classification. He considers “ Radio- 
laria a bad group. 
Carter (3) holds that “ Imperforata ” and “ Perforata ** must be 
united. 
Anatomy and Development. 
Arcella (2) may have four nuclei, probably owing to fission. As a 
further stage in this development, A. vulgaris was observed with no 
nucleus but full of cell-like bodies which developed nuclei, and emerged 
from the mother-cell. These cells divide either by segmentation of the 
entire cell, forming a morula, the outer cells being formed around super- 
ficial vacuoles (in some cases the nuclei had apparently broken up into 
granules, wbicli were ejected), or by division of the nucleus alone into 
five. 
Parasitic Monothalamia observed in the Arcella, p. 20. 
Spores from nucleus (2) were observed in the parasite Phonergates, g, n. 
Plasmodia of colonial Rhizopods : — (2) Observed to result from fusion 
of amoeboid bodies proceeding from resting spores of Phonergates ; the 
plasmodium becomes encysted. 
Spicules in P'oraminifera ; — (6) Calcareous spicula in the sp. n. 
described, united by calcareous .matter. 
Laminar P'oraminifera : — (6) Polytrema planum occurs in sheets. 
Bathybius. Cf. anted, p. 3. 
Coccosphere (24), p. 342 ; originally carries the coccoliths ; perhaps it 
is an algal sporangium, perhaps animal ; two species given (pi. xvii.). 
Distribution. 
E. P. Wright (25) gives lists of the Foraminifera dredged at the 
Seychelle Islands, and near Cagliari (Sardinia) ; 52 species or varieties, 
including 3 new, from the former, 35 from the latter. 
Carter {Spongida, 3) mentions Pulvinulina, Dictyocha, &c., as taken by 
dredging in Smith’s Sound, (Dape Napoleon. 
Entz (8) mentions finding Amoeba Umax and A. radiosa, Ehrb., in the 
sea at Cuxhaven ; and in a salt-pan near Klausenburg finds Ciliophrys, 
four species of Amoeba, tend Podo stoma, and generalizes as to the relations 
of the fauna under the exceptional conditions mentioned. A. marina, 
A. polypodia, Sch., and P Protamoeba polypodia. Hack., = A. radiosa, 
Ehr. ; id. 1. c. p. 360. 
Leidy (14) remarks that Rhizopods are scarce in limestone districts. 
