48 
MICROSCOPICAL AND NATURAL HISTORY SECTION. 
December 2nd, 1878. 
Charles Bailey, F.L.S., in the chair. 
Mr. Plant, F.G.S., stated that a specimen of the Black- 
throated Wheat-ear (Saxicola stapazina, Temminck.) had 
been shot at Raw tens tall, near Bury, Lancashire. 
Professor W. C. Williamson, F.R.S., remarked that the ' 
supposed Radiolarium from the coal measures that he had 
lately brought before the notice “of the Section, had been 
submitted to Professors Haekel and Strassburger, and pro- 
nounced by them both to be a spore. 
Mr. Marcus M. Hartog, F.L.S., read a paper entitled 
“ A Preliminary Abstract of an Investigation of the 
Nervous System of Cyclops. 5 ’ 
Two descriptions exist of the Nervous System of Cyclops ; 
one by Zenker, who describes a chain of ganglia ; another 
by Claus, completed by Leydig, correct so far as it goes, of 
a brain, an aesophageal ring, and a ventral cord, only seen 
in the last two thoracic segments, after which it is described 
as forking. These last observers also describe the anten- 
nary nerves as having each branch thickened in its course 
into a ganglionic ring. I am able to confirm this, and to 
add the following points : — The ganglionic swellings are 
found near the terminations of all sensory nerve fibres. I 
have succeeded in seeing the central nerve cord more fully, 
i.e., from the 2nd thoracic segment onwards. At the end of 
the 3rd segment it gives off a pair of nerves which pass 
