73 PROCEEDINGS OF SOCIETIES. 



the 98 drawings figured by Mr. Sidebotham M-ere taken. They 

 were principally Pieris, Antbocaris, Thestias, Euterpe, and 

 Eronia ; amongst tbe former were some new and unnamed species 

 from Celebes, Avitb rare specimens from Venezuela, Quito, East and 

 AVest Indies, Africa, and otber parts of tbe world. 



Mr. Dale placed on tbe table a number of wasbed soundings, 

 of wbicb several members took specimens for examination. 



Mr. Dale also reported tbat tbe sulpbate of copper and mag- 

 nesia bas been long known to be a compound salt. Wben the 

 magnesian salt is in excess, it bas seven equivalents of water ; 

 and when tbe copper salt is in excess, it bas five equivalents of 

 water. Mr. Dale had also made for tbe occasion 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 bail's on tbe Loasa coccinea (Chili 

 nettle), mounted by Mr. Heys. 



Mr. Dancer exhibited a specimen of tbe Aulaeodiscus formosus, 

 which, in consequence of a fracture since it was mounted, shows 

 more distinctly the form of the projections tbat Mr. Sidebotham 

 brought under tbe notice of the Section at the last meeting. 

 These handle-shaped spines, Mr. Dancer observed, seen with the 

 l-8tb power and binocular microscope, are found to project out- 

 wards from each of the four elevations on the surface of the valve. 



Mr. Dancer also exhibited several ova of the Trout, foi*warded 

 by Mr. John Whalley. 



Mr. John Parry showed some magnified photographs of fossil 

 woods from tbe South Lancashire coal field. These displayed 

 beautifully tbe structure, even to the most minute vessels. 



Mr. Brothers exhibited the Flosciclaria ornata, and a fine 

 group of Lacinularia socialis. 



Mr. Mosley exhibited a specimen of Amoela diffluens, and 

 described the peculiarity of its motion. A portion of tbe one 

 under examination appeared to be blown outwards like a bladdei*, 

 in which appeared a small animalcule making desperate efforts to 

 escape. Tbe best illumination for observing the internal motion, 

 he considers to be Wenbam's parabola and Lieberkiihn, with a 

 4-lOth objective. 



Decemler IQth, 1861. 



E. W. BiNNEY, Esq., E.E.S., E.G.S., in the Chair. 



Dr. Edward Morgan was elected a member of the Section, 

 Letters were read by tbe Secretary from Mr. Sidebotham and 

 Mr. Watson from London, relative to the cost of engraving two 

 plates to illustrate Mr. "Watson's paper " On Scales of Lepidop- 

 tera" read at last meeting ; Mr. Brothers exhibited two photo- 

 graphs of these scales, and reported upon the expense of printing 

 by that method. It was decided that tbe Secretary be requested 

 to lay the estimates before tbe Society. 



