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MICROSCOPICAL AND NATURAL HISTORY SECTION. 
Ordinary Meeting, 12th March, 1883. 
Alfred Brothers, F.R.A.S., Vice-President of the Society, 
in the Chair. 
Mr. Francis Nicholson, F.L.S., of Fountain Street, 
Manchester, was elected a member of the Section. 
Mr. Thomas Rogers exhibited a section, prepared and 
mounted by Mr. H. Hensoldt, of a meteorite found at 
Braunfels in Germany, in which were fluid cavities stated 
to show under certain circumstances a slight movement of 
the contents. 
Mr. John Boyd read some notes on the male of Argulus 
Foliaceus, a parasite found on the Carp, and exhibited 
living specimens and diagrams illustrative of the anatomy 
of this Entomostracan. He drew special attention to the 
inaccuracy of Jurine’s description of the male organs of 
generation, viz. : a penis on the last swimming leg on each 
side and seminal vesicles on the corresponding joints of the 
preceding pair of legs, and showed that the supposed penis 
was a thumblike hook, and that each of the so-called seminal 
vesicles contained a recess with a flap, into which the 
corresponding thumb could be hooked. After commenting 
on the extreme improbability of the generative organ being 
doubled, as Jurine supposed, Mr. Boyd pointed out that the 
organs in question were evidently claspers used to seize and 
hold the female, just as the last pair of legs in Diaptomus is 
used, and showed by a diagram that in that animal one leg 
Proceedings— Lit. & Phil. Soc.— Yol. XXII.— No. 8— Session 1882-3. 
