426 SUMMARY OF CURRENT RESEARCHES RELATING TO 
Chaunoplectella appears to be allied to the well-known Venus’ Flower- 
basket ; Hyalascus is a near ally of Asconema, while its close affinity to 
the Rossellidae cannot be denied ; Aulosaccus is a new Bossellid, repre- 
sented by a single specimen. 
Protozoa. 
The Genus Ceratium.* — Dr. E. Vanhoffen finds that the form known 
as Ceratium tripos (O. F. Muller) Nitsch, var. labradorica Schiitt, occurs in 
enormous numbers in the Greenland plankton, and without intermediate 
forms linking it to others. He proposes, therefore, to regard it as a 
distinct species under the title C. labradoricum Schiitt, and to keep the 
name C. tripos (O. F. Muller) for C. tripos var. baltica Schiitt. The 
genus Ceratium in the strict sense should include only those forms in 
which the three horns are turned to the side which is foremost in loco- 
motion. Those with one horn forwards and two backwards, of which 
C. furca Dujardin is type, should be placed in the genus Biceratium ; 
the C. fusus type in the new genus Amphiceratium , the C. gravidum type 
in the new genus Poroceratium. 
New Ciliata. - ]* — Herr Hs. Wallengren proposes a new family Chilo- 
dochonina for a new genus Chilodochona with two species Ch. Qvennerstedti 
and Ch. microchilus. He also describes the structure and life-history of 
Heliochona and Hemispeira Asteriasi Fabre-Domergue. 
Bodo urinarius.J — M. Barrois gives an account of the peculiar 
Infusorian said to be found in human urine. The author lays particular 
stress upon the fact that the Infusoria found by him only appeared in 
urine which contained animal matter, and which had been exposed some 
time to the air; in no case did he find them in fresh urine. Bodo 
vrinarius would appear, therefore, not to be a parasite, but to exist in 
the air in a spore-like form, ready to develope whenever it is brought 
into contact with a suitable nidus. 
Freshwater Acinetse.§ — M. B. Sand points out that the form E. Buck 
described as Acineta gelatinosa belongs to the genus Podophrya , and gives 
descriptive notes on Trichophrya epistylidis, Urnula epistylidis, and Toho- 
phrya quadripartita, all from Belgian waters. In regard to AcinetsB in 
general, the author maintains the cosmopolitan distribution of species : 
the occurrence of the same species on various substrata ; the presence 
of a single or double cuticular layer on the body, tentacles, and stalk, 
with minute pearl-like markings as in Diatoms ; the constant occurrence 
of an internal prolongation of the tentacles; the gelatinous, amorphous 
transparent content of the stalk ; the frequent division of the nucleus 
long before the cytoplasm. He agrees with Maupas as to the centri- 
fugal and centripetal currents in the process of suction, identifies the 
refringent spheres as albuminoids, and describes the cytoplasm as both 
reticular and alveolar. 
Foraminifera of Voyage of ‘ Albatross.’ || — Mr. Axel Goes reports 
on the Foraminifera collected at 131 stations in the West Indian waters, 
* Zool. Anzeig., xix. (1896) pp. 133-4. 
f Acta Univ. Lunch, xxxi. (1895) pp. 1-77 (4 pis.). 
X Amer. Natural., xxx. (1896) pp. 67-9. 
Ann. Soc. Beige Micr., xx. (1896) pp. 87-103 (1 ph). 
