NATURAL HISTORY SOCIETY OF GLASGOW. Ill 



Orihotrichum calvescens (Wils. MSS.), recently discovered in the 

 Killarney district by Dr Carrington; Ness Glen, where he 

 gathered it, being the second extra Irish station for this moss. 

 He further stated that he had found Hypnum albicans, in fruit; 

 Breutdia arcuata, in abundant fruit, and several others of less rare 

 occurrence, in Ayrshire. In illustration of his remarks, Mr Shaw- 

 exhibited specimens of all the mosses which he enumerated. 



II. — On the Recently Noticed Blight affecting the Naples Variety of the 

 Black Currant. By Mr Duncan M'Lellan. 

 Mr M'Lellan observed that the disease, which was now known 

 to be caused by the ravages of a sj)ecies of Acarus, was almost 

 exclusively confined to this variety, and that in the West of 

 Scotland, where it had been plentifully cultivated, the injury 

 committed was very considerable. The so-called blight had been 

 known for many years, and it was thought the variety referred to 

 was unsuitable for growth in this country. Mr David Bowman 

 remarked that he had been investigating, for some months, the 

 nature of this blight, and had, by means of a microscope, dis- 

 covered immense numbers of an unknown insect in each of the 

 shrivelled buds. These had been submitted, through Mr Chap- 

 man, to Professor Westwood for examination, and he was unable 

 to refer the new Acarus to anything he had ever seen. Further 

 research, however, was necessary to make out the mature form of 

 the insect, and both Mr Bowman and Mr Chapman expressed a 

 hope of being able, in a few months, to trace the creature through 

 all its various stages of development. 



March 28th, 1865. 



John Scouler, M.D., LL.D., F.L.S., President, in the chair. 

 Mr David Hay was elected a resident member. 



SPECIMENS EXHIBITED. 



Mr John Young exhibited an interesting slab of shale, enclosing 

 five of the long terminal fingers belonging to the head of a crinoid 

 — Poteriocrinus crassus — which he had found recently at Newfield 

 Quarry, High Blantyre, a locality which has yielded many fine 

 and well-preserved carboniferous fossils. He stated that the 



