143 
Mr. Watson exhibited a number of mounted specimens of 
the plumules, and four cases of the Lepidoptera from whose 
wings the 98 drawings figured by Mr. Sidebotham were 
taken. They were principally Pieris, Anthocaris, Thestias, 
Euterpe, and Eronia ; amongst the former were some new 
and unnamed species from Celebes, with rare specimens from 
Venezuela, Quito, East and West Indies, Africa, and other 
parts of the world. 
Mr. Dale placed on the table a number of washed 
soundings, of which several members took specimens for 
examination. 
Mr. Dale also reported that the sulphate of copper and 
magnesia has been long known to be a compound salt. When 
the magnesian salt is in excess, it has seven equivalents of 
water ; and when the copper salt is in excess, it has five 
equivalents of water. Mr. Dale had also made for the occa- 
sion samples of the double sulphate of copper and potash, 
the double sulphate of copper and ammonia, and the double 
chloride of copper and ammonia, which he distributed 
amongst the members. They were all beautiful polariscopic 
crystals, the chloride particularly so, and each has its 
characteristic form. 
Mr. Linton exhibited the hairs on the Loasa Coccinea 
(Chili nettle), mounted by Mr. Heys. 
Mr. Dancer exhibited a specimen of the Aulacodiscus 
formosus, which, in consequence of a fracture since it was 
mounted, shows more distinctly the form of the projections 
that Mr. Sidebotham brought under the notice of the Section 
at the last meeting. These handle-shaped spines, Mr. Dancer 
observed, when seen with the l-8th power and binocular 
microscope, are found to project outwards from each of the 
four elevations on the surface of the valve. 
