74 The Irish Naturalist, 



Mr. Greenwood Pim exhibited Macrosporium cheiranthi from damp 

 wall-paper, showing its peculiar muricate spores. 



Prof. T. Johnson exhibited Girandia sphacelarioides, a brown alga found 

 growing on the leaves oi Zostera at Roundstone (Moynes) in Co, Galway. 

 The plant is recorded from the south coast of England and is an addition 

 to the Irish marine flora. The peculiar lateral wart-like sori of sporangia 

 were shown, and Goebel's investigations on the mode of reproduction in 

 the species were described. 



On the same Zosiera leaves were growing plants of Castagnea zostera;, Thin., 

 showing plurilociilar zoosporangia. This brown alga was found growing 

 on the leaves of the marine monocotyledon Zostera at Moynes near 

 Roundstone, the only known Irish locality. Here it was discovered 

 fifty years ago by McCalla, and is recorded in Harvey's Phycologia 

 Britannica under the synonym Mesogloia virescens /3 Zoostericola. The 

 species is also recorded from the south coast of England and the west 

 of Ireland. 



Mr. McArdIvE exhibited a proliferous form oiLejeimea serpyllifolia^which. 

 he collected last year in Mr. Hickson's wood at Lispoll, near Auniscaul, 

 Co. Kerry. The adventitious shoots grew from all parts of the branch. 

 Under a high magnifying power he showed a portion of the stem and 

 attached leaf lobule, with young shoots arising from each. The leaves 

 showed still more remarkable examples of adventitious shoots. The 

 specimens showed the first stage, the outgrowth of a simple cell from 

 the margin ; the second stage in which several additional cells were 

 formed ; a perfect leaf with five adventitious .shoots in various stages of 

 development, on some the leaves were well marked; and a further stage, 

 a shoot with three leaves and two perfectly formed stipules or folioles, 

 and at the attachment of the stem to the old leaf, root hairs ; the contents 

 of the cells had disappeared, the walls near the attachment showing 

 disintegration. 



Mr. McArdle also exhibited a drawing of five figures demonstrating 

 the different stages of development of the young plantlets of Lejewiea, 

 and a proliferous form of Meizgeria conjiigata, a specimen under the micro- 

 scope showed secondary branching of an adventitious shoot from the 

 thallus. This uncommon mode of re-production in Lejeimca will form the 

 subject of an article on the vegetative propagation amongst Hepaticae, 

 with plate, Avhich will shortly appear in the Irish Naturalist. 



Mr. G. H. Carpenter showed a slide (prepared by Mr. J, E. Duerden) 

 of a hydroid, Boiigainvillia ramosa, in which some of the cups were much 

 enlarged and thickened, forming a kind of " gall" inhabited by the 

 parasitic embryo of a Pycno^on. Clinging to the stem of the hydroid 

 was a larval Nymphon^ but it could not be definitely stated that the 

 embryos in the cups belonged to the same species. Dohrn and others 

 have described the embryos of Phoxichilidiiun as sometimes parasitic in 

 the polyps of Podocoryne. 



Dr. M'Weeney showed j5ure cultures and a slide of the Bacillus 

 diphtheria (Klebs-I^offler) obtained from a diphtheritic membrane sent to 

 him for bacteriological examination by a Dublin physician. The micro- 

 organisms were quite typical and were contained in pure cultivation 

 from the membrane. The patient recovered. 



Mr. J. N. HAI.BERT exhibited two very rare Irish beetles, Micropeplus 

 iesserula, Curt, and Pseudopsis sulcata, Newm., from the collection of Mr. A. 

 H. Haliday, the former taken in a marsh near Holywood {Entomologist, 

 vol. I., 1840), the latter also from Holywood, and Avoca. He was in- 

 duced to bring these forward as both were entirely overlooked as Irish 

 in Canon Fowler's " British Coleoptera." Judging from the records, both 

 are rare in England, where Psetidopsis sulcata seems not to have been taken 

 north of Yorkshire. 



