108 
never was aware whicli species was captured, till examined, tlie flight of 
both being remarkable for their extreme similarity. 
By Mr. Hastings C. Dent, F.L.S. — Some Brazilian Insects, remarkable 
for their protective colouring and mimicry. 
By Mr. Charles Bailey, F.L.S. — A series of sheets illustrative of the 
principal forms of aquatic Buttercups growing in Britain, constituting 
the genus Batrachium of Du Mortier (“ Opuscules de Botanique ” Fasc. 
IV.) . Du Mortier separated it from Ranunculus on account of the fruits, 
which he considered to be true drupes, whose fleshy covering when dry 
forms the transverse wrinkles characteristic of the genus; in the 
terrestrial Buttercups {Ranunculus) the fruits are dry (achenes). 
Attention was drawn to the great difference in form between the sub- 
mersed leaves and the floating leaves. 
Also a selection of fifty forms, out of several hundreds, of the Hieracia 
of Middle Europe, belonging exclusively to one section, the Piloselloidea. 
as re-arranged by C. v. Nageli and A. Peter. (“ Die Hieracien Mittel- 
Europas,”) The Hawk weeds constitute one of the most difficult and 
polymorphous of all European genera, and the specimens exhibited illus- 
trated some of the transitions of the principal species, intermediate 
forms, and hybrids. 
Also a set of British Erythrcece, including the recently discovered 
Erythroea capitata, Willd., which differs from all the other members of 
the group in having the stamens free from the base of the corolla tube^ 
instead of sessile near the throat of the corolla, as in all the other British 
members of the genus. Explanatory remarks were attached to the 
sheets. 
In the Natural History Koom. were exhibited, under 
microscopes— “ 
By Mr. T. Sington. — Geological Specimens. 
By Mr. F. A. Huet, L.D.S., B.C.S. — Injected Web of Frog’s Foot, 
Trichina sprialis in Human Muscle. Silky Earth Mite, Tromhidium 
holosericeum. Pollen of .Hollyhock, 
By Mr. J, Barrow. — Some Botanical Sections. 
By Mr. A. Brothers, F.E.A.S. — The Electric Spark. 
By Professor Boyd Dawkins, F.E.S.— Sections illustrating the structure 
of Eocks. 
By Mr. Blackburn, F.E.M.S. — Plant Lice (Aphides). 
By Mr. John Boyd. — Itch Insect of Man: Sarcoptes scabiei. Lancets 
of the Flea. Argulus foliaceus — a parasite of the Carp (alive). Phihirius 
inguinalis — a parasite of Man. 
By Mr. Pettigrew. — Lophopus crystallinus. Colony of Vorticellm. 
By Dr. Tatham. — Eesolution of Test objects under Water Immersion 
Lenses. 
By Mr. Wilde. — An Optical Lantern adapted for use with the Lime 
and Electric Lights, and presented by him to the Society. 
