Dublin Microscopical Club. 419 



tropliy was due to this pathological condition. The ceUs of the 

 gland were of uncommon size, and showed most clearly the reticular 

 protoplasm of the nucleus, as well as of the cell-substance ; and it 

 was, indeed, chiefly in illustration of this that the slide was exhibited. 

 Mr. Abraham had with him some sections through the tail of a 

 newt, in which the epidermic cells showed the same structures, cor- 

 roborating the observations of Klein, Fleming, and others, upon 

 which he made some remarks. 



Structure of an abnormal pilose Tumour in the Pharynx.- — Mr. 

 Abraham further showed a section through an abnormal pilose 

 growth, congenital, in the pharynx of a girl. A white glistening 

 tumour had been for years observed in the girl's throat behind the 

 velum palati. Latterly it increased much in size, and interfered 

 with swallowing. When excised and examined microscopically it 

 was found to consist chiefly of adipose and areolar tissue, with a 

 central nodule of fibro-eellular cartilage, with fibres of striped 

 muscular tissue passing in various directions ; it was covered with 

 ordinary skin, possessing a well-marked epidermis with rete Mal- 

 pighii and corneous layer, numerous hair-follicles and hairs, seba- 

 ceous and sudoriferous glands. There was in places a considerable 

 hyperplasia of epidermic cells. Mr. Abraham threw out the sug- 

 gestion that the pressure of epidermis on the top of the pharynx 

 might indicate the line of epiblastic invagination by which we know 

 the pituitary body is formed in the embryonic encephalon. 



Green Gland of Palinurus. — Mr. Henry St. John Brooks showed 

 sections of the green gland of Palinuras vulgaris. The object, 

 so difficult to obtain, owing to its quick decomposition after death, 

 had been secured by killing the animal by hasmorrhage, when the 

 gland was dissected out and placed in absolute alcohol. 



3Ietaca7jx(l Bones of the Manus of a ten-day Pappy. — These were 

 shown in section by Mr. B. C. Windle. The first section, taken about 

 the middle, besides the normal muscles, tendons, ifec, showed an extra 

 interosseus muscle between the second and third metacarpal bones 

 which was interesting as pointing to a probable original symmetry 

 of the interossei, subsequently lost by the disappearance of one. 

 The second section, taken from the same puppy at the base of the 

 fijst phalanges, showed the bosses of cartilage which would have 

 developed into the desmoid bones. 



Botryosporium diffusum, Corda. — Mr. G. Pim showed Botryo- 

 sporium diffusum, Corda. This is one of the most beautiful and 

 delicate forms amongst the Mucedincs, and consists of numerous 

 slender threads branching occasionally and beset witli short ramuli, 

 each crowned with a globose mass of minute oval spores. The 

 whole plant is pure white. The specimens shown occurred on dead 

 stems of Ipomcea at Moukstown, co. Dublin, this autumn. 



Aspergillus from Memhrana tympani. — Mr. B, Wills Eichardson 



