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 w^ere 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. 



