dublin microt^copical ci.ur. 105 



Dublin Microscopical Club. 

 2Qth June, 1873. 



Si/nedra investie^is, W. Sm. exhihited. — Rev. E. O'Meara 

 phowed a slide oi' Spiedra investiens (W. Sm). He had found this 

 form in Kingstown Harbour, where he believed it had been found 

 by Captain Crozier ; recently, too, Mr. O'Meara had found it on 

 seaweeds collected by him at Howth. 



Microscopic Finger. ~J)r. J. Barker showed a "microscopic 

 finger" he had himself constructed after the American model, with 

 certain improvements, and spoke of some modifications he had 

 been thinking of to effect certain further improvements, so as to 

 cause the prehension of the object to be effected by a purely ver- 

 tical, not sweeping, action ; he hoped to experiment ere long in 

 carrying out these alterations. 



Conjugated state of Desmidium Swartzii. — Mr. Crowe re- 

 corded the occurrence of the conjugated state of Desmidium 

 Swartzii, a very common desmid, but very rarely found show- 

 ing zygospores. In fact, it does not seem to have presented 

 itself to any members of the Club in that condition since the 

 occasion on which, it was recorded by Mr. Archer, 18th May, 

 18G7, The figure given by Ralfs is very graphic, though, 

 as pointed out on that occasion, two filaments are really con- 

 jugated and the spores formed from the combined contents of 

 two distinct apposed joints, not, as Ralfs supposed, owing to the 

 extremely close juxtaposition of the pair of flat-sided fila- 

 ments, by the mere consolidation of the contents of a single 

 joint. 



Green Tlpistylis. — Mr. Porte showed fine examples of the green 

 Epistylis commonly found growing on the shells of aquatic snails. 



Meade's Prism. — Mr. Robinson exhibited some beautifully 

 mounted diatoms by the aid of 'Reade's prism,' which, however, 

 was not pronounced so satisfactory as that of Amici, which he had 

 shown to the Club on a recent occasion. 



Hairs from flower of Ogpripedium caudatxim. — Dr. Moore 

 showed the hairs from the flower of the curious Cypripedium 

 caudatum. The hairs seemed of two sorts — colourless, rather 

 stout threads, with clavate ends, and more attenuated threads, with 

 light red contents, these together forming the pretty ^i7e apparent 

 to the unaided eye. 



29M July, 1873. 



Fungus on Sanguisorha-leaf — Mr. Crowe showed Xenodochus 

 carbonarius, a fungus found on Sanguisorba-leaf forwarded by 

 Rev. J. H. Yize ; the elegant moniliforra arrangement of the cells 

 caused it to form an interesting object. 



New Stand for Amici' s Prism. — Mr. Porte showed a new 

 arrangement by means of two " ball-and-socket " joints and 



