[ 241 1 

 BY PROF. T. JOHNSON, D.SC, AND MISS HENSMAN. 



The Galway excursion afforded several excellent opportunities for sliore- 

 coUecting. It is to be regretted that so few took advantage of tliem. 



I would suggest that, on our next Field Club Union excursion members, 

 on joining the meeting, be invited to act as collectors in some special 

 group of plants or animals. On the first day, during the preparation of 

 lunch on Gentian Hill, one of us searched the somewhat muddy shore on 

 the western side of the hill, gathered a number of shells attacked by 

 the perforating algse, and found Zostera nana, which is referred to else- 

 where. Sea- weeds were collected at Gleninagh, Co. Clare, the low rocky 

 shore affording some good rock-pools, the coralline Lithothamnioti 

 polyfnorphuvi lining some of them. Here was found the common green 

 Codiion tomentosiim infested by the brown alga Strcblonema simplex, hitherto 

 only once recorded for Ireland, by one of us; another species, S. 

 fasciadatum, growing on Mesogla:a vermiailata, is new to Ireland. Sporochmis 

 pedunculatus was found washed ashore. It would be out of place to give 

 here a full list of the species noticed or gathered. It maybe of interest to 

 state that Holmes and Batters make a preliminary attempt to indicate the 

 distribution of sea- weeds in their " Revised L^ist of the British Marine 

 Algse" (^Annals of Botany, vol. v., 1890). For this purpose the coast of 

 the United Kingdom is divided into fourteen districts, in which Ireland 

 is represented by districts 10-14, Galway Bay being included in district 



II (Slyue Head to Crow Head). It would be comparatively easy for us 

 to make out a list of species found, not recorded in the above-mentioned 

 list for district ir. Such a proceeding would be out of place, as there 

 are many species, in collections made by earlier workers, known to us, 

 not recorded. The following are some of the interesting finds : — 



Delesserla, all (6) species except D. angustissima. 



Phyllophora rubens, infested with Acthiococcus. 



Champla parvula, with cystocarps. 



Ceramlum tenulsslmum. 



Rhodophyllis bifida, with cystocarps. 



Dudresnaia cocclnea, with antherrdia, procarps and cystocarps. 

 This beautiful and rare red alga is one in which one act of fertilisation 

 results in the formation of a number of cystocarp fruits. 



Coralllna rubens. 

 Ca squamata. 

 Choreonema Thurctf. 

 Melobesla cortlclformls. 



Ascocyclus orbicularis, on Zostcm, new to Ireland. 

 Castagnea zosterse. 



Species of Cystosclra, Ctadostephus, Ectocarpus, Urospora, 

 Monostroma, Euteromorpha, Cladophora. 

 Hyella cdespltosa, 



B 



