RHJZOPODA. 
ProL 17 
Hertwig, adding Chlamydophora. He recognizes in the class about 24 
genera and 36 species, 7 of the genera being of uncertain soundness. 
Various species figured by him, 1 . c. pis. xiii.-xvi. 
Actinophrys sol, some phenomena in the conjugation of ; J. D. Cox, 
Am. Micr. J. ii. p. 183, figs. [Not seen by Recorder.] 
Centropyxis nebelliformis, Vejdovsky, (27) p. 138, note, spring-water, 
Prague. 
Plagiophrys sacciformis, (23) p. 116, pi. iv. figs. 30-37. Fission com- 
mences by the formation of an equatorial furrow in the test which ends 
in the division of the body in this direction. 
Foraminifera. 
Globigerina dutrerteri, var. n. borealis, Brady, c 1 6) p. 69, Arctic Seas. 
Orbitolites tenuissimus. Carpenter, The Microscope and its Revelations, 
Ed. vi. p. 556, fig. 318, showing mode of reparation of broken disk. 
Nummoloculina contraria, Steinmann, is in part IJauerina contmria, 
Brady, according to the latter, (16) p. 71. 
Squamulina. Systematic position discussed by Carter, Ann. N. H. (5) 
vii. p. 364. 
Saccammina splimrica. (17) pp. 400 & 402, the most prominent Forami- 
nifer found off Franz- Josef Land ; not found off Novaya Zemlya. 
Proteonina fusiformis, Williamson, (17) p. 405, = Rheophax scorpius. 
Haplophragmium nanum, Brady, (17) p. 406, pi. xxi. fig. 1. 
Hippocrepina indivisa, Parker, (17) p. 407, pi, xxi. figs. 3 & 4. 
Truncatulina lobatula, (17) p. 400, in northern seas, when adherent, 
assumes a coat of fine sand ; so also some Nonionince and Polystomellce, 
and some adherent arenaceous forms. 
Lagena tricincta, Giimbel, =: Fissurina orbigniana, Seguenza ; Brady, 
(17) p. 410. 
Arcella, (23) p. 111. Appears to agree with Cypliodcria in its mode of 
division. 
Difflugia, (23) p. 112, pi. iv. figs. 16-18. Gruber believes the sand 
grains to be first taken into the protoplasm of the body and then arranged 
so as to form the shell. 
Gromici socialis, (23) p. 115, pi. iv. figs. 21-24. The early stages of 
fission observed ; an actively amoeboid protoplasmic mass is extruded from 
the shell of the original cell and takes the adult form. 
Cyphoderia ampulla, (23) p. 108, pi. iv. figs. 4-12. The later stages 
of fission observed at short intervals by Gruber ; the young shell is at 
first quite transparent, and is not entirely filled with protoplasm ; of 
the new nuclei formed by fission of the parent nucleus, the one destined 
for the young cell does not reach the latter until some time after this 
stage ; it then becomes longitudinally striated, but loses this appearance 
soon afterwards ; the shell is made up of small polygonal plates. 
Euglypha alveolata, (22) p. 431, pi. xxiii. Fission occurs by protrusion 
of protoplasm from mouth of test and formation of new test over it, 
and by elongation of nucleus and its division into two parts, one of which 
remains in each test; the new test is formed by shell-plates detached from 
the old test ; before its fission, the old nucleus becomes finely granulated. 
