380 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
forming yellowish spots on Microcosmus Sdbatieri at Banyuls. It is 
characterized by its colour, large size (it may extend over six centi- 
metres), the complete absence of vacuoles, and the enormous quantity of 
its nuclei. Iu other points its organization is exceedingly simple. It 
has not been observed to form cysts or spores. 
A Marine Cryptomonas.* — M. P. A. Dangeard signalizes the 
existence of a marine Cryptomonas, a few examples of which he observed 
at Luc-sur-Mer. In colour it approaches C. erosa, in form and size 
C. ovata. The author recognizes the incompleteness of his short 
description, and names the species C. marina. 
Pteromonas alata Cohn.f — M. Golenkin has found this unicellular 
organism in a ditch near Moscow, and identifies it with Cryptoglena 
angulosa Cart, and Phacotus angulosus Stein. It is characterized by 
the possession of a shell composed of two equal halves, which leaves an 
incombustible, probably siliceous, skeleton, after heating with nitric 
acid. It has a rod-shaped eye-spot. Non-sexual multiplication takes 
place after the manner of the Chlamydomonadeae ; sexual reproduction 
by the copulation of two similar microgonids, which are formed in 
numbers varying from 8 to 32 in a mother-cell. The germination of 
the zygotes was not observed, nor any palmella-condition. 
Classification of Coccidia and Gregarinida4 — Sig. P. Mingazzini 
reviews the various classifications proposed by Kolliker, Stein, Gabriel, 
Biitsclili, and others, and argues in favour of his own : — 
Coccidiidea .. Spherical or oval, non-mobile, not conjugating, 
living within cells or tissues. 
Monocystidea .. Variable ini form, mobile, generally free; conju- 
gation, when it occurs, almost alwnys bv “ op- 
position.” 
Polycystidea .. Two segments, of which the anterior may bear an 
accessory piece; conjugation, when it occurs, 
almost always by “ opposition.” 
Didymophyidea. Three segments ; the individual results from the 
conjugation of two by “ opposition.” 
New Coccidia parasitic in Fishes.§ — M. P. Thelohan has a few 
observations on Coccidia found in the Sardine, Tench, and Caranx 
trachurus , and directs attention to the presence in the tissues of various 
Fishes of small ovoid bodies with a thick membranous envelope, and a 
nucleus ; he is of opinion that they are parasitic organisms, but does 
not know with what known parasite they have any relation. 
Haematozoon of Malaria. || — Dr. P. Hehir, of the Nizam’s Medical 
School at Hyderabad, has published an account of his microscopical 
observations on the Haematozoon of Malaria. He looks upon the 
haematozoon as a polymorphic organism. 
* Le Botaniste (Dangeard) iii. I. (1892) p. 32 (1 fig.). 
t Bull. Soc. Imp. Nat. Moscou, 1891, 16 pp. (1 pi.). See Bot. Ztg., 1. (1892) 
p. 66. I Atti R. Accad. Lincei (Rend.), ser. v. vol. i. (1892) pp. 68-75. 
§ Comptes Rendus, cxiv. (1892) pp. 136-8. 
|| Separate copy, sent by author, no date, no place of publication, 4to, 27 and ii. 
pp. (9 pis.). 
Body of one 
segment. 
Body of two 
or more 
segments. 
