DUBLIN MICROSCOPICAL CLUB. 441 



long, of the cutia vera (from the human heel), totally stripped of 

 epithelium. The papillae were thus perfectly exposed and in full 

 relief. Sections o£ the heel were made with the freezing micro- 

 tome last year, and he, being engaged with other matters, had to 

 allow them to remain until recently, in glycerine and some 

 Beale's carmine stain. To his surprise, when he examined them 

 he found that the epidermis had separated from all the sections, 

 possibly from the action of the ammonia of the staiu, which wasiu 

 excess. With some trouble he restained a few of them with 

 anilin blue, two of which were those he exhibited. They were 

 mounted in Warrant's solution, an excellent medium for anilin 

 blue stainings, as he fancied it preserved the colour. 



Pithopliora Kewensis, transferred from Kew, and floiirisJiing 

 at Glasnevin, sJiown. — Dr. Moore showed a copious growth of 

 Pithophora Kewensis, Wittr.. in the normal healthy state,- from a 

 small supply sent from Kew in July, 1878, to Dr. E. P. Wright, 

 and which Dr. Moore had placed in one of the tanks at Glas- 

 nevin, where it seemingly was inclined to flourish. 



A prohahly new Cosmarium, shoivn. — Mr. Archer showed exam- 

 ples of what seemed to be either a new Cosmarium or a form 

 of Cosm. hexaJohum, Nordst., some from Scotland, prepared by 

 Mr. Bisset ; others from County Wicklow, obtained in Griencree. 

 These specimens at least were absolutely identical, one and the 

 same thing in the most minute detail, and Mr. Archer thought 

 would really prove to be distinct from Cosm. hexalolum, besides 

 being apparently decidedly smaller. It is, here, at any rate, a 

 very rare form. 



^99^ of EcTiinorhyncus, various stages, shoion. — Dr. Macalister 

 exhibited the eggs of Ehcinorhyncus pinguis, showing the early 

 stages of the formation o£ the embryo of that species, the tri- 

 laminar egg-envelope, and the two kinds of blastomeres, into 

 which the yelk eegments. The formation of a central cavity 

 was also visible in some of the more mature embryos. 



Structure of the green normal leaves of Pinus monophylla. — 

 Professor McNab exhibited transverse sections of the green nor- 

 mal leaves of Pinus monophylla. Usually in Pinus the normal 

 leaves are reduced to thin scales in whose axils the short shoots 

 with the needle leaves are developed. Frequently, however, in 

 P. vionophylla, these normal leaves, instead of being, as they 

 sometimes are, mere scales, become large green flattened struc- 

 tures resembling the leaves of Abies. Such leaves, often with 

 single needles or two needles in their axils, are frequent on young 

 plants, on the newly formed shoots, both terminal and lateral. 

 On transverse section these normal leaves are seen to be somewhat 

 triangular, flattened above, but with a projecting midrib below. 

 Both upper and under surfaces possess stomata. There are two 

 resin canals in each leaf close to the epidermis of the under side, 

 and about halfway between the rounded margin of the leaf and 

 the projecting midrib. There is a single fibro-vascular bundle, 

 surrounded by a distinctly marked sheath ; the hypoderm is well- 



