342 SUMMARY OF CURRENT RESEARCHES RELATING TO 
Development of Gregarines of Marine Worms.* * * § — M. L. Leger 
has made a study of the development of Doliocystis nereidis, which lives 
in the intestine of Nereis cultrifera and of D. polydorse sp. n. from the 
intestine of Polydora Agassizi. During the budding stage the Gregarine 
always consists of two segments, but this dicystid stage does not last 
long ; the young very soon lose their epimerite, and become free in the 
intestine, when they appear to he true Monocystids. The author finds 
that the development of these two species is identical with that of the 
genus Schneideria , the only difference being that, in these, the epimerite 
is always simple. Encystment and sporulation are on the polycystid 
type. The author proposes the new generic term Doliocystis , and 
regards the genus as peculiar to the digestive tube of marine Worms, 
while Schneideria is found in terrestrial Arthropods. 
Haematozoa of Cold-blooded Vertebrates.f — M. A. Labbe states 
that, with the exception of the Flagellate Infusoria and Cytamoeba 
ranarum , the Protozoa parasitic in the blood of cold-blooded vertebrates 
all belong to the genus Drepanidium, of which, at present, four species 
are known ; at present they have not been detected in the blood of 
Fishes, though they probably exist there. A short account is given 
of Drepanidium , and it is suggested that a group should be formed for 
them, to be called Hemosporidies [Heematosporidia]. 
Lower Organisms in Caterpillar Blood.J — Dr. E. Hartig found 
Cercomonas muscse domesticse by millions in the blood of a healthy pine- 
moth caterpillar. These Flagellata do not appear to have been observed 
previously in caterpillars’ blood. In caterpillars, pupae, and imagines 
which had been attacked by Tachinse and Ichneumonidae, large numbers 
of a yeast-like fungus were found, and to this a malady of the caterpillar 
is to be ascribed. It is oval or lemon-like in shape, resembling Saccharo- 
myces apiculatus, but is larger than it, being 6-8 /x in longitudinal dia- 
meter. Infection of living pine-moth caterpillars and cultivations did 
not succeed. 
Protozoa in Mycosis fungoides.§ — Prof. E. Wernicke describes a 
protozoon which was found in a case of mycosis fungoides — a skin 
disease affecting the corium, and having histological appearances re- 
sembling, according to some observers, a granuloma tumour, and according 
to others sarcoma. In the author’s specimen the tumours in the corium 
consisted of round cells with sometimes giant cells, having one or many 
nuclei. Within the giant cells were included bodies regarded by the 
author as Coccidia. They are round bodies, of a pale yellow colour, in- 
vested by a hyaline chitinous jnembrane. Their contents are granular, 
and no nucleus was demonstrable therein. 
As many as ten of these bodies were observed in one giant cell, 
and they measured from 3 to 30 mm. The contents of the cysts, 
though usually granular, sometimes consist of definitely segmented 
* Comptes Rendus, cxvi. (1892) pp. 204-6. t Op. cit., cxv. (1892) pp. 617-20. 
J Forstlieh-Naturwi8s. Zeitschr., i. (1892) pp. 124-5. See Centralbl. f. Bakteriol. 
u. Parasitenk., xii. (1892) p. 269. 
§ Centivilbl. f. Bakteriol. u. Paiasitenk., xii. (1892) pp. 859-61 (4 photomicro- 
graphs). 
