144 PROCEEDINGS OF SOCIETIES. 



seen ; crude petroleum ; petroleum scales, or the solid extract ; puri- 

 fied wax, and manufactured articles from the same, illustrating the 

 petroleum from its crude to its manufactured form. 



Mr. Hennah exhibited some very beautiful specimens of arsenite 

 of copper, collected by his grandfather from Cornish mines. 



Mr. Wonfor exhibited thi'ce birds, lent by Messrs. Pratt — the 

 Iceland gull, a very rare bird in Sussex, shot recently off Brighton 

 by Mr. Goldsmid ; the shore lark, an occasional visitor ; and the grey 

 phalerope, which had been somewhat abundant in the south this year ; 

 also a sjiecimen of the striped hawk moth, D. Uvornica, caught at 

 Brighton this year, and varieties of the poplar hawk moth, S. populi. 



Mr. Sewell exhibited a bone, obtained at a depth of 14 feet in 

 Norfolk Square, which resembled a human tibia more than the bone of 

 any of the animals, — such as the horse, ox, elephant, or deer, — asso- 

 ciated with the Post-Pliocene. 



Mr. C. Smith exhibited and presented for the Society's Herbarium 

 two mosses, new to Britain, recently discovered by Mr. Mitten in 

 Sussex, viz. Pottia littoralis, found near Aldrington, and Pottia aspeni- 

 losa, near Hastings. They had not yet been described, nor had they 

 been seen by the Botanical world at present. He had been fortunate 

 enough to find one of them since Mr. Mitten's discovery. 



December 22nd. — Microscopical Meeting. Mr. Glaisyer, Vice- 

 President, in the chair. 



Mr. E. Glaisyer announced the receipt of twelve slides from Mr. 

 Gwatkin, three from Mr. Wonfor, and two slides of spicula of the new 

 sponge Pheronema Grayi, obtained in the " Noma Expedition," off the 

 coast of Spain, from Mr. Marshall Hall, the owner of the yacht ; and 

 a reprint from the ' Monthly Microscopical Journal ' of a paper on 

 the same sponge by Mr. W. S. Kent. Yotes of thanks were given to 

 these gentlemen. 



Mr. Hennah called attention to a series of cheap lenses by Gundlach, 

 very kindly lent to him by Mr. T. Cm-ties, of the establishment of 

 C. Baker, 244, High Holborn, the agent for England, for exhibition 

 before the Society. Since the last meeting he had had an opportunity 

 of carefully examining, through the courtesy of Mr. Curties, a series 

 of Gvmdlach's lenses, ranging from a ^ to a ^ih.. The ^ and :|:th were 

 not good, the ^rd was a perfect lens, the same might be said of the 

 Y^th and -y^^. The last, which was on the immersion principle, was 

 especially useful, as giving 600 diameters with a low eye-piece, and 

 working through thick glass. No recent additions to the microscope 

 have equalled these lenses as instruments of research in minute 

 natui'al history. The -^^^^ though very good, yet being a dry lens, 

 approached nearer than the -jijth, and was in power equivalent to a 

 Eoss's ith ; they also worked through thick glass, and were not inferior 

 to any lenses he had seen, though Eoss's ^th was supei'ior on P. angu- 

 latum. They would be very valuable to those who did not possess 

 English lenses of this power, especially as in the whole series the 

 price of the objectives was about one-third that of English ones. Find- 

 ing the first specimens so good, he had asked Mr. Curties to send 

 others, so that they might be able to judge if the supply would be 



