PROCEEDINGS OF SOCIETIES. 



Dpblin Microscopical Club, 

 January \%tli, 1872. 



Rev. E. O'Meara submitted for inspection three forms of the 

 genus Tryblyonella closely resembling each other in character of 

 the striation : — 1, Tryhlijonella Hantzschiana, Grunow, narrow- 

 lanceolate with pointed apices ; 2, T. Victories, Grunow, linear, 

 rounded suddenly at the end, much shorter and relatively broader 

 than the former ; 3, a form longer and narrower than T. VictoricB,, 

 with the ends pointedly arched. He remarked that he had 

 found the two former not unfrequently in fresh water — for 

 instance, T. Hantzschiana in a marlhole in the South of Co. 

 Wexford, and T. Victorice in Lough Neagh, far from marine 

 influences, though both had occurred sparingly in brackish 

 localities. No. 3 had never been found by him in fresh water, 

 but in several places within reach of the tide. Taking into 

 consideration the localities in which he had found the form, as 

 well as the peculiarities of outline invariably exhibited, he 

 thought it was likely a distinct species, and was provisionally 

 inclined to regard it as such under the name of Tryblyonella 

 suhsaUna. 



Dr. Macalister exhibited some scales from the pelvic shield of 

 ChlamydopJiorus truncatus, showing the component scutes of that 

 portion of the animal's integument to consist of large polygonal 

 cells of squamous epithelium of uniform size, the deeper cells 

 being thicker and softer. 



Mr. Archer exhibited a fine living Gromia, obtained from one 

 of the Connemara gatherings in autumn last, well showing its 

 characteristic extremely long, copiously arborescent, and reticu- 

 lated pseudopodia, with the active circulation of granules carried 

 along by the currents of sarcode. This might possibly be no very 

 important addition to the list of Ehizopoda found in the 

 Connemara gathering already mentioned in these Minutes (Oct., 

 1871) ; but this form was at least to him one of rare occurrence, 

 although from the mode it is sometimes referred to in different 

 writings, one might assume it was sufficiently common ; yet its 

 being so seldom encountered by him may be possibly due to his 

 searches being in situations not this form's favorite habitats. 



Professor Traquair exhibited on the part of Mr. Carruthers 

 (who kindly forwarded it for the occasion) a preparation of 

 a singular organism discovered by him in making sections of 



