RHIZOPODA. 
Prot» 10 
extends a sail-like protoplasmic film from its edges, forming a disc. 
White Sea. 
Pleurophrys angulata^ id. (7), p. 192, pi. x. figs. 14 & 14 a, Lake Onega. 
Difflugia solowetzhii^ id. (7), p. 194, pi. x. fig. 17. 
Cellepora hemisphcBrica^ Parfitt (10), p. 50, = Tinoporus. W. coast of 
Ireland, Scotland, Dee Estuary ; to be called T. lucidus. 
Calcaromma calcarea [-ream], Thomson (11), i. p. 233, fig. 61. Contains 
echinated calcareous spheres. Pacific. 
Euglypha mucronata and E. hrachiata^ Leidy (5), p. 172, New Jersey 
swamps. 
Trichosphcerium^ Schneider (9), p. 452. T. sieholdi, id. ihid. figs. 14-17. 
In seawater from Ostend. Body of changeable shape ; no shell, but 
firm cutis, perforated by tubes, emitting protoplasmic processes, and set 
with bristles soluble in weak fluids ; protoplasm granular, with some 
hyaline particles ; in spring globular, with continuous mammillated 
shell (like Polyzoa gemmules), which are soon found empty. Appa- 
rently Foraminiferous, between Lieherkuehnia and the typical forms. 
Amceha blattce, Biitschli (16), p. 273, fig. 26, exhibits fibres in its proto- 
plasm, also plurality of nuclei, and encystation. 
Amceha papillata, Mereschkowsky (7), p. 203, pi. xi. figs. 31 & 32, 
Northern Dwina. 
Amceha angulata and A. jelaginia, id. (7), pp. 203 & 204, pi. xi. figs. 3, 
29, & 30, St. Petersburg. 
Amoeba emittens^ id. (7), p. 205, pi. xi. figs. 6-11. Vacuole disappears 
entirely on contraction. Archangelsk and St. Petersburg. 
Amoeba alveolata and A. Jilifera^ id. (7), pp. 207 & 209, pi. xi. 
figs. 40-42, White Sea. The former contains numerous large vacuoles. 
Amoeba solidula, Grimm (16). Nucleus consists of a homogeneous and 
a granular part. Found in an aquarium. • 
Hastigerina, Thomson (11), ii. p. 291. 
Ilastigerina murrayi, id. 1. c. figs. 51 & 52, Atlantic, Pacific. 
Incert^ sedis. 
Pyrocystis, Murray (11), ii. p. 88. A thin apparently siliceous cell wall 
containing clear liquid ; protoplasm showing cyclosis : a nucleus. P, 
noctiluca^ fusiformis, Murray, 1. c. figs. 21 & 22, Equatorial Atlantic. 
[Possibly belongs to Diatom ace^.] 
Anatomy and Physiology. 
Actinosphcerium, Brandt, SB. nat. Fr. 1878, p. 171. The axial fibres 
of the pseudopodia consist first of pure vitellin, overlaid by another 
organic substance ; the pseudopodia are contractile ; the superficial body 
substance assists in the movements. 
Material, modes of building, and colour of tests of deep-sea Arena- 
ceous Foraminifera, e. g., Lituolce, Cyclammina sp., Marsipella^ Pilulina^ 
Astrorrhiza, Trochamminay &c., pointed out by A. M. Norman, Ann. N. H. 
(5) i. p. 284. 
Tables showing comparatively the characters of protoplasm and pseudo- 
