1896.] Proceedings of Irish Societies. 51 



JNIr G. H. Carpenter showed a female spider, Leplyptantes pallidtis, Cb., 

 collected in the Mitchelstown cave in Jul}- last by Mr, H. L. Jameson. It 

 is an addition to the Irish fauna. Although possessing well-developed 

 ej-es, this spider is stated by M. Simon to be, in France, an inhabitant of 

 caves. It has been found in similar situations in Bavaria. Mr. Cambridge 

 took the t3'pe specimen at roots of Heather in Dorset. 



Mr. Moore exhibited root-hairs of a plant which had been received at 

 (jlasnevin, as CoUigtiaja oJo]-ifcra, but which was not this species. The 

 plant produced slender green stems, bearing rather fleshy leaves. 

 From the epidermal tissue around these leaves a dense cushion of 

 unicellular delicate white root-leaves were produced, and later on from 

 this cushion, in the axil of the leaves, an adventitious root was developed. 

 The appearance of this cushion of fine leaves was very remarkable. The 

 hairs had protoplasmic contents. 



Mr. Greenwood Pim showed Phyllactinia guttata. Lev., an interesting 

 mildew which occurred in great abundance on Ash leaves at Brackens- 

 town. 



Prof. T. Johnson exhibited a section of Dilsea edttlis, Stackli., a red 

 alga to be found at low water all round the Irish and English coasts. 

 The section showed growing, in the Dilsea thallus, a small green alga, 

 Chlorochytrinm inchisuni, Kjell., and, on its surface, a red alga Nitophylliun 

 reptans, Crn., which creeps over the Dilsea thallus, clinging to it by short 

 multicellular crampons (sucker-like bodies). The endophyte, C. inclusiim, 

 and the epiphyte, N. reptans, are additions to the Irish marine flora. 

 Both are recorded from the south coast of England, and N. reptans from 

 the east coast of Scotland. The specimens (of which spirit material was 

 also exhibited), were gathered in September, 1895, on the west coast of 

 Sherkin Island (Co. Cork). Judging from Kjellman's remarks (" Algae of 

 the Arctic Seas "), C. imluswn should be found wherever D. edulis occurs. 

 C. inclusiwi is a good illustration of a ' raum-parasite.' N. reptans was also 

 found on Laniinaria stalk, its more usual anchorage. 



Mr. M'ArdIvE exhibited the reproductive organs of Plagiochila asple- 

 nioides, L-, which he collected recently in Howtli demesne. This widel}" 

 distributed liverwort is rarely found in fruiting condition. One specimen 

 under the microscope showed the fully grown perianth, cut longitudi- 

 nally and folded back, exposing several unfertilised archegonia at the 

 base. The antheridia exhibited were large, obovate to sphserical in shape, 

 with a well-marked hyaline marginal ring, stalks or pseudopodia as long 

 as the antheridia, of which there were three enclosed in the saccate base 

 of each altered leaf, the whole amentse is formed of from four to seven 

 pairs, situated at the apex of each stem, which becomes incurved during 

 growth in a remarkable manner. The male plant is much smaller than 

 the female, and was growing apart from it, this may account in some 

 measure for the scarcity of the fruit, although it has been reported to be 

 found with both organs on the one plant (monoecious). 



