310 PROCKEDINGS OF SOCIETIES. 



having traced these spaces into lympliatics ; they had been 

 injected by His by the puncture method. 



Multiple Cystic Tumour of Breast. — A specimen of this, ex- 

 hibited by Mr. Needham, seemed to show, from the excess of 

 epithelium in the mammary tubules, and the epithelial infiltra- 

 tration of surrounding parts, at once a cystic, adenomatous, and 

 cancerous nature. Mr. Needham founded his idea of cancer on 

 the arrangement and not on the intrinsic form of the cells 

 composing it. 



Dublin Miceoscopical Club. 

 22nd January, 1874. 



Hairs and Epidermis of Oxalis. — Dr. Moore showed hairs of a 

 Cape species of Oxalis, studded, as is so common with most species 

 of the genus, with transparent papillae. — 'He also showed the 

 epidermis of the lower surface of a leaf of Oxalis fragrans, which 

 showed the cells filled with purple sap, amongst which were 

 abundance of transparent stomata. 



Notes on Bermuda Diatoms. — Rev. E. O'Meara showed some 

 Diatoms from Bermudas in a collection made by Mr. Moseley, of 

 the " Challenger " expedition, at the south-west bank, Bermudas, 

 from a depth of thirty-one fathoms, 23rd April, 1873. This 

 abounded with forms belonging to the genera Bhahdonema, 

 Isthmia, Podocystis, Grammatophora, and Cocconeis. The Isthmia- 

 form was similar in some respects to /. enervis (Ehr.), but it was 

 considered by Mr. Kitton, of Norwich, to be identical with S. 

 minima (Harvey et Bailey). Several specimens of Grammatophora 

 serpentina (Ehr.) occurred, which were remarkable for the stria- 

 tiou being much coarser and the internal spiral structure being 

 longer and of greater tenuity than is usual with the forms of that 

 species found commonly in our country. Some few specimens of 

 Navicula apis, Ehr., Surirella fastuosa, Ehr., Acfinoptycus senariits, 

 Ehr., Coscinodiscus radiatus, Ehr., Synedra rohusta, Ealfs, were met 

 with, as also numerous specimens of Cocconeis crehristriata, Grev., 

 G. coronata, C. punctatissima, Grreville, and C. fimhriata, Ehr. 

 Eour specimens were found of a new species of Navicula, 

 previously found in Ireland by Mr. O'Meara and named N. 

 Pfitzeriana. There were also other forms requiring further 

 study. 



Sodium Chloride Crystals in presence of Urea. — Mr. B. Wills 

 Richardson exhibited some crystals of sodium chloride which he 

 obtained from a saturated solution of this salt to which a solution 

 of urea had been added. The crystals were much modified in 

 form by the presence of the urea ; one very large (microscopic) 

 rhombic dodecahedron attracted a good deal of attention, its form 



