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Dennant exhibited sections of fossil teeth from the coal measures ; 

 Dr. Halifax showed some of his sections of insects, in which the 

 internal parts were displayed in situ, one of the most striking 

 being the lady-bird. Mr. Cooper exhibited deep sea soundings 

 from different localities, and Foraminifera from Hastings, the 

 Mediterranean, and Australia. Mr. Sewell exhibited injected pre- 

 parations of Dr. Thudicum's rabbit, an animal possessing a world- 

 wide reputation from being fed at times on muscle containing 

 Trichina spiralis ; the presence of Entozoa was traced in all parts 

 of the voluntary muscle, but nowhere else. Mr. Aylen showed a 

 number of entomological* preparations. Dr. Addison exhibited 

 blood, as acted upon directly by various agents, such as diluted 

 sherry, &c., the effect produced was an alteration in the appear- 

 ance of the blood discs, and, as some expressed it, the formation 

 of tails ; this was considered'by no means the least interesting part 

 of the evening's display. Mr. Peake exliibited the pygidium of the 

 lace-wing fly, Chrysopa perla, discovered by himself The exis- 

 tence of this peculiar structure has long been known in the flea, 

 but has not been pointed out in any other insect. Dr. Kebbell 

 exhibited with a Nachet's prism the rasping teeth situated on the 

 disc of the proboscis of the Blow-fly. Mr. Smith showed fruit of 

 Hepaticse and epicarpal Stomata of moss, Fuiiaria. These are 

 only found on the fruit of mosses, and never on the leaves. Mr. 

 Heunah showed plant circulation in the hairs of the Tradescantia, 

 Spider- wort, and remarked that every microscopist should possess 

 a root of this plant in his garden ; pollen showing the production 

 of the pollen-tubes ; and CapreUae from Black Rock, Kemp Town, 

 &c. Mr. Wonfor exhibited a slide of Diatom, mounted by Miiller, 

 of Holstein, on which, in the space of a quarter of an inch, 408 

 separate siliceous skeletons of plants were arranged in symmetri- 

 cal rows ; very gorgeous crystals of Hematoxylin, the colouring 

 matter obtained from log- wood ; artificial alizarine, prepared from 

 an oil of coal gas. 



In addition to these microscopic objects, Dr. Halifax exhibited 

 a number of beautiful microphotographs of his own taking ; and 

 Mr. J. Howell, pebbles picked up on the beach, showing encri- 

 nites, pentacrinites, bryozoa, cidaris spines, &c. 



