114 NATURAL HISTORY SOCIETY OF DUBLIN. 



Dr. Macalister remarked that the TJnio margaritifera was found 

 larger in size, and more abundantly, in the rivers of the east than in 

 those of the west coast of Scotland. He had known it, likewise, to oc- 

 cur on pebbly bottoms, as well as on the banks of mud. He had once, 

 contrary to general experience, found a pearl, not within the folds of 

 the mantle, but imbedded in the nacre of the shell. 



The meeting then adjourned to the first Friday in May. 



FRIDAY, MAY 6, 1864. 

 "William Andrews, M.E.I. A., President, in the Chair. 



The Minutes of the preceding Meeting having been read and signed, 

 the following donations were presented : — 



The Grey -backed Shrike, from the Eev. Michael B. Cox, Glenties, 

 through William Harte, Esq. ; male Sparrow-hawk, from R. P. Williams, 

 Esq. ; and a monstrous double-headed three-legged Duckling (in spirit), 

 from Dr. Croker. 



A vote of thanks was unanimously passed to the donors of the fore- 

 going. 



The following paper was then read : — 



Report on the Progress made in collecting the Irish Lichens, accom- 

 panying a Presentation to the Natural History Society op a 

 complete Series oe Specimens oe those hitherto collected ; with 

 an annotated llst thereof, alphabetically arranged, and an 

 Index-List to the Collection in the order in which the Species 

 occur therein. By Admiral Theobald Jones, E. L. S., E. Gr. S. 



Some time ago, having been requested by the Dublin University Natural 

 Science Association to collect and record the Irish Lichens, I undertook 

 to do so, and the present Collection is the result of my labours hitherto. 

 But, since then, that Association having become united with this Society, 

 I have great pleasure in handing over the Collection herewith to the joint 

 Society. It consists of 349 specimens, gummed to sheets of paper, in four 

 fasciculi. The specimens are not arranged in any definite order. To each 

 Lichen is appended a number referring to an accompanying separate 

 manuscript catalogue for each fasciculus, and in which are duly recorded 

 the names of the plants, the locality where each is gathered, and by 

 whom, and often -additional original remarks. Such of the specimens 

 as I supposed to be new were sent to Dr. Nylander, and were named by 

 him ; with the assistance of Mr. Carroll, I have as far as possible named 

 the remainder ; but it is to be observed that several specimens, though 

 referred to their proper genera, are not specifically named. Some of these 

 obscure forms proved on further examination to be known Lichens, 

 and, though duplicates, were permitted to remain in the collection, rather 

 than by their removal derange the distinguishing numbers of it. 



