ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
375 
5.~ Incertse Sedis. 
Moss-haunting Rotifers.* — Mr. P. G. Thompson gives a general 
account of the rotifers found in moss, and describes two new species 
which he calls Macroiracliela multispinosa and M. papillosa. The 
former is the second species of the genus known to bear spines, and the 
second is covered with conspicuous blunt papillae about its foot. Both 
are British. 
Floscularia Gossii.f — Mr. J. Hood describes a new Floscularia found 
on Chara feetida taken from the Stormont Loch, Blairgowrie, of which 
be was so fortunate as to find the male as well as the female. The 
former is a symmetrically formed maggot with a wreath of cilia to 
propel it through the water, in which it moves very swiftly. The female 
has the coronal head in the form of a bell-shaped cup, and differs from 
F. calva in having three instead of two lobes. The tube which it 
forms is rougher and stronger than in any already known species of 
the group. 
Floscularia quadrilobata.J — Mr. J. Hood describes a new species 
of Floscularia which is remarkable as having four lobes ; each of these 
bears a fan-shaped tuft of very long setse. Encased in a clear crystalline 
tube it is, we are told, an object of great beauty. The whole length is 
one-seventietli of an inch, and the species was found in a pond a few 
miles north of Dundee, attached to Banunculus and Nitella. 
Echinodermata. 
Oogenesis and Spermatogenesis in Echinoderms.§ — M. L. Cuenot 
draws attention to the lacunas in our knowledge of the evolution of the 
sexual products of Echinoderms, and asks what is the exact and precise 
part played by the sexual cells of the genital cords in the new formation 
of genital cells after an evacuation of them. Is there a migration in 
mass of the cells of the cords, or do the new products arise from young 
ova or from spermatogonia ? 
Echinoderms of Cape Horn. j| — In the only part of this memoir as 
yet published, Prof. 0. Perrier deals with the Asteroidea and discusses 
a number of interesting points. 
New Genera. — The author thinks it advisable to distinguish under 
the name of Diplasterias such species of the genus Astcrias as have two 
rows of ambulacral spines or are, to use Bell’s nomenclature, diplacan- 
thid. Poraniopsis, Cribraster, Lebrunaster, and Asterodon are new genera 
that connect hitherto isolated genera. 
Attachment of Young. — Special attention is directed to the attach- 
ment of the young to the parent, especially as seen in Asterias spirabilis 
Bell; in this species the disc of the mother is slightly elevated, and the 
anus approximated at the base ; the young, of which as many as twenty 
* Science-Gossip, 1892, pp. 56-61 (8 figs.). 
t Internat. Journ. Mier. and Nat. Sci., ii. (1892) pp. 73-8 (2 pis.). 
% Internat. Journ. Microscopy, ii. (1892) pp. 26-8 (2 pis.). 
(j Zool. Anzeig., xv. (1892) pp. 121-5. 
|| ‘Mission Scientifique du Cap Horn, vi. Zoologie, Echinodcrmcs,’ Paris, 4to, 
1891, 198 pp. and 13 pis. 
