RHIZOPODA. 
517 
camminaj Valvulina, LinguUm, Spirillina, Bigmerina^ Cassidulina, Anomalina, 
Tinoporus, Nuhecularia, Operculina, and Nummulina. Two new forms are 
very common, viz. Quinquiloculina fusca, sp. nov., H. B. Brady (jh. p. 286), 
= Q. agglutinans, H. B. Brady (1865), and Trochammina inflata, var. ma- 
crescens, var. nov., H. B. Brady (^6. p. 290). Several species occur not 
previously recorded from British localities, viz. Quinquiloculina candeiana^ 
B’Orb., Dentalina guttifera, D’Orb., Textularia glohulosa, Ehr., Gaudryina 
pupoides, D’Orb., Verneuilina spimdosa, Beuss, Bolivina plicata, D’Orb. One 
effect of brackish conditions seems to be a diminution of the calcareous matter 
in the tests; the brackish-water specimens are mostly smaller and thin- 
shelled, Miliolida (e. g. Quinquiloculina fusca) and Lituolida (e. g. Trocliam- 
mina inflata) becoming sometimes keratose. Soine show a green tint, as 
Polystomella striatipunctata and Nonionina dcqjressula. 
Mr. G. W. Dawson gives a short account of the distribution of Forami- 
nifera in the Gulf and River St. Lawrence, with a table showing the results, 
as to distribution, of twenty-three gatherings from those waters and neigh- 
bouring parts of the Atlantic. (Oanad. Nat. Juno 1870, pp. 172-180.) 
Archer (Q. J. Micr. Sc. July 1870, p. 303) notices a freshwater or- 
ganism from Ireland, closely resembling Cicnkowski’s genus Lahyrinihula^ 
from which, however, it differs in several particulars. Mr. Archer does not 
as yet apply a name to this form, which if not a Labyrinthulean, is at all 
events a perfectly distinct and novel freshwater rhizopod. 
Greeff (/. c.) announces the discovery in fresh water near Poppelsdorf of a 
rhizopod analogous to the marine Bathyhius. It consists of globules of sar- 
code existing in immense quantity, and never disappearing at any Season 
from the pond where it occurs. The sarcode, of irregularly vacuolate con- 
sistency, contains numerous bodies derived from without, such as shells of 
Bijfflugicc, Arcellm^ and Diatomacetx. It also contains peculiar round or oval 
nuclear bodies and fine staff-shaped structures ; most of the former have no 
definite structure, and resist the action of acids and alkalies, and may, in the 
opinion of the author, be compared to coccoliths. There are also softer bodies 
comparable to cell -nuclei ; therefore this rhizopod is not a Moneron like 
Bathyhius, but a multicellular organism. To this organism Greeff applies the 
generic name Pclobius*, and promises a more minute account of it. 
A minute account of Bathyhius, and of the associated cyatholiths, disco- 
liths, and coccospheres, is given by Hackel (Jen. Z. Nat. v. 1870, pp. 492- 
660). Bathyhius, according to Hackel, is a Moncron, That the Coccoliths 
and coccospheres are produced by it, is, he thinks, probable, but not yet 
fully made out ; and here he refers to the singular concretions found in the 
arms of the Radiolarian Myxohrachia (chronicled above). He also enters into 
the difficult questions connected with the nourishment and reproduction of 
Bathyhius and other elementary forms of life at great depths. 
Magosphtxra planrda is the name given by Hackel to a new microscopic 
organism which ho found attached to marine conferva {Cladophora) on the 
Norwegian coast. The stages of its life-history, through which Hackel has 
traced it, are as follows: — 1st. The encysted stage, in which the organism 
constitutes a globular cell with nucleus and nucleolus, and closely resem- 
bles an ovum. 2nd. The stage of cleavage, in which the nucleus and cell- 
contents multiply by division into as many as thirty-two daughter-cells. 
[Preoccupied in Coleoptera. — En.] 
