106 PROCEEDINGS OF SOCIETIES. 



"telescopic" stem for mounting Amici's prism, which he had 

 devised and constructed, and which he found in use a very conve- 

 nient form of stand ; he thought this could be produced by makers 

 more cheaply than the ordinary stand. He was strongly in favour 

 of this illumination, as both readily managed as well as highly 

 effective in showing the test markings of critical diatoms, and 

 hence as valuable in ordinary use. 



Diatomella Balfouriana exhibited. — Mr. Porte showed Dia- 

 tomella Balfouriana taken at Killarney on a late excursion 

 thither ; this diatom was in Mr. O'Meara's experience rather a 

 rare one. 



Corrigendum in reference to locality for Tryhlionella dehilis, Arn. 

 — Rev. E. O'Meara desired to correct an error which had crept 

 into the " Mmutes " in reference to the record of Tryhlionella 

 dehilis, Aruott (see the Club Minutes of 2nd Nov., 1872), which 

 was quoted as found by Dr. Arnott in " S. Brittany," in place of 

 " North Britain," having been found at Mary-Hill Bridge, Grlas- 

 gow. For this correction the Club is indebted to its corresponding 

 member, Mr. Kitton. 



Navicula spectatissima (?) from Seychelles. — Rev. E. O'Meara 

 exhibited a Navicula which he considered identical with N. specta- 

 tissima, Grev. The striation is precisely the same as that of 

 G-reville's form, but the marginal portion not by any means so 

 wide, and the edges not waved. Only two specimens were found 

 in the gatherings from the Seychelles. 



Liasydytes antenniger, Gosse, and Ghcetonotus gracilis, Oosse, 

 exhihited for the first time as Irish. — Mr. Archer showed, side 

 by side, examples of the seemingly rare forms of " hairy- 

 backed " animalcules Dasydytes antenniger, Grosse, and Chce- 

 tonotus gracilis, Gosse. The former he had never happened 

 to notice before, and the latter only rarely. Both occurred 

 in gatherings from Co. Westmeath ; they were both rare to 

 Gosse himself, he having seen but one specimen of C. gracilis, 

 and D. antenniger occurred but once to him in a pond near 

 Leamington. • They are both very elegant creatures. C. gracilis 

 is large and long, elegantly marked, comparatively slow and very 

 graceful in its movements as it glides about hither and thither ; 

 the much more minute D. antenniger is a headlong and restless 

 swimmer, very difficult to catch a steady view of. Luckily on 

 the present occasion one was caught in a little vacant enclosure 

 amongst the dirt on the slide, and a good view was obtained. The 

 creature seemed to have the power to depress and elevate the 

 " antennae." 



Anthoceros Icevis exhibited for the first time as Irish. — Pro- 

 fessor Lindberg, of Helsingfors, with whose company the Club 

 was honoured on this occasion, showed specimens of Antho- 

 ceros Icevis taken by himself and Dr. Moore (on a recent journey 

 to Cos. Kerry and Cork,) at Yentry, this being the first occasion 

 of this species being found in L'eland. Dr. Lindberg showed the 

 minutely verrucose spores, with their elaters, under the micro- 



