11 12 8 Proceedings of the Royal Irish Academy. 



on Slievemore summit are Hylocomium squarrosum and Antitrichia curti- 

 pendula. The last-named was not found by Messrs. D. A. Jones and party 

 in 1911, or by myself in 1908 and 1909, when it was specially looked for on 

 Slievemore. 



Along the ridge up Slievemore, described above, grow Badula aquihgia, 

 Mastigophora woodsii, Blepharozia ciliaris, Marswpella jorgensenii, Hyloeomiwni 

 wmbratum, Dicranum uncinatum, Dicranum scottii, Dicranum fuscescens, 

 Scapania ornithopodioides, Scapania nimbosa, and several Lejeunias. 



Lejeunias are very scarce on Clare Island, where they seem to be unable 

 to contend with the climate and environment. 



No Gymnomitrium has been found in the area, and only one Andreaea in 

 very small quantities on Slievemore and near Louisburgh. 



On Slievemore Mr. Pearson and H. W. Lett found two great clumps of 

 Scapania ornithopodioides with which there was scarcely a stem of anything 

 else mixed ; one measured 2 feet by 9 inches, and the other 3J feet by 

 18 inches, the individual stems being all of luxuriant growth. 



The Newport and Westport district, situated on the limestone, and with a 

 good deal of wood, was disappointing, the arboreal and calcicole species being 

 remarkable by their absence. Hypnwm crassinervc is the only species of the 

 latter group that was found, and Riccia sorocarpa was collected by 

 Mr. Praeger at Belclare, near Westport. Knockranny wood, along the 

 stream to the east of Westport, was not more productive. 



The plants of Croaghpatrick are few, and nothing rare was found upon it. 

 In the Louisburgh district the flora is also poor in numbers, and is made up 

 chiefly of what were collected in the wood at Old Head, amongst which was 

 the rare Radula holtii, which had been collected in 1901, not far off, on Ben- 

 gorm, in this botanical division, by H. W. Lett. 



The Hypnaceae are scarce on the island; and of Marchantia polymorpha 

 only one colony was seen : it was in a little gully near the sea-shore south of 

 Knocknaveen. 



4. OB I GIN OF THE FLOBA. 



The few miles which Clare Island is distant from the mainland do not 

 create any difficulty in holding that the Mosses and Hepatics were all intro- 

 duced to the island by the wind carrying their spores across the separating 

 strait. The only introduced species met with in the whole area was Lunuhirin 

 cruciata, which Mr. Pearson found in abundance on rocks near the quay at 

 .Newport, where it is doubtless, as it is in its other Irish habitats, an escape 

 from some greenhouse in the neighbourhood. 



