ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
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attention is directed to tho very marked striation of tlie ectoplasm, as 
seen in sections ; in the form of its sporos and tho absence of a vacuole 
from its protoplasm the new type approaches Myxidium Lieberlcylmi, and 
it ought to be placed in the same family with that genus. A new species 
of Myxidium (M. incurvulum) has been found in the gall-bladder of 
various fishes. 
Fresh- water Thuricola.* — Prof. F. Vejdovsky describes IJiuricola 
Gruberi sp. n. from a stream in Bohemia ; at first sight and with a low 
power it has a close resemblance to Vaginicola crystallina ; its nucleus 
is greatly elongated and very delicate ; the organism has two opercula. 
Neusina Agassizi.t — Mr. A. Goes describes a peculiar type of 
arenaceous Foraminifer from the American Tropical Pacific, which he 
calls Neusina Agassizi. Its most striking feature is its stroma, which 
forms a strong network of very fine chitinous threads, incorporated 
with a thin layer of finest sand and debris of shells. The test is leaf- 
shaped, and reminds one of the Alga Fadina. Sometimes new indi- 
viduals bud from the broad side, where they form irregular clusters. 
The chambers form concentric, more or less complete bands, w T hich 
increase in length with age. The two ends of the chambers are usually 
prolonged into a narrow, more or less compressed, hollow appendage 
with thin walls. The wall of the chamber is thin, and is in places 
pierced by irregularly formed pores of different sizes. The largest 
specimens are about 190 mm. in breadth, but, on account of their brittle- 
ness, specimens in perfect condition are rarely obtained. This new 
form was dredged at a depth of 1740 fathoms. Dr. R. Hanitsch i has 
no doubt that this Foraminifer is one of Haeckel’s Deep-Sea Keratosa, 
and he thinks it is identical with Stannophyllum zonarium. 
Parasitic Protozoa.§ — Dr. M. Braun reports on various recent works 
on parasitic Protozoa. He calls attention to the appearance of the second 
edition of L. Pfeiffer’s work,|] which deals especially with the forms which 
live in the cells and cell-nuclei of other animals. F. FaggiolilT has 
exposed a number of free-living Infusoria to the action of the blood-fluid 
of various animals, and observed in most cases an extremely deleterious 
action ; this appears to be due to chloride of sodium, for, by the action 
of a dialyser, blood can be made indifferent. In fact, it would appear 
that it is to the salt alone that the action is due. Various writers have 
investigated the Amoeba of dysentery. There is a considerable amount 
of literature on the Sporozoa. 
Leger** has published an extensive account of his researches on 
Gregarines. He divides them into those in which the spores have no 
shell — Gymnosporidse (Porospora of Homarus ), and the Angiosporea, in 
which the spores have a shell ; the latter are divisible into two groups ; 
in the first, or Polycystidea, the spores have equal poles ; here we have 
the Clepsidrinidae, Anthocephalidee, Acanthosporidas, Stylorhynchidm,, 
* Congres Internat. Zoologie, II. i. (1892) pp. 52-7 (3 figs.). 
f Bull. Mus. Comp. Zool., xxiii. (1892) pp. 195-8 (1 pi.). 
i Nature, xlvii. (1893) p. 365. 
§ Centralbl. f. Bakteriol. u. Parasitenk., xiii. (1893) pp. 61-8, 92-101. 
I| ‘Die Protozoen als Krankheitserreger,’ Jena, 1891. 
^ “Dell’azione deleteria del sangue sui protisti,” Bull. Acad. Med. Genova, vL 
(1891) 15 pp. ** Tablettes Zool. (Schneider), iii. (1892) pp. 1-182 (22 pis.). 
