1888-89.] 137 



well as types of various extinct animals of the glacial and post- 

 glacial periods. He then referred to the various traces of early 

 man in North-east Ireland, describing the sand dunes such as 

 those at the mouth of the Bann, Ballintoy, and Newcastle. 

 He next referred to caves and their inhabitants, showing 

 in each case, as he proceeded, many beautiful views in the 

 lantern to illustrate his statements. The interesting class of 

 pillar stones and holed stones were next reviewed, and exam- 

 ples shown. Cromlechs, and the analogous structures known 

 as kistvaens, were then described with numerous examples. 

 The relation to these of stone circles was dwelt upon. Cran- 

 noges, or artificial islands, were referred to. The lecturer said 

 it had been his intention to have followed up the subject by 

 discussing the round towers, and other early monuments of a 

 more advanced nature, but would have to leave them to 

 another occasion. 



The Chairman, and Messrs. Wright and Lockwood spoke 

 in high terms of the lecture, and hoped the subject would 

 be continued upon the first opportunity. 



The election of several new members then took place, and it 

 was announced that owing to the visit of Sir William Thomson 

 the next meeting would be held a week earlier than the date 

 on the programme. 



The sixth meeting of the winter session was held in the 

 Museum, College Square North, on 9th April — the Vice- 

 President (Mr. Joseph Wright, F.G.S.) in the chair — when 

 three distinct communications were brought forward. 



The first was by Rev. H. W. Lett, M.A., T.C.D., entitled 

 " Notes on some Desmids found in the North of Ireland." 

 The lecturer stated that there was no popular name for the 

 plants known as fresh-water Algce, as there is the word " sea- 

 weeds " to describe those which are marine. However, in 

 Ulster the country people use the word " glit " to describe the 

 green threads and slimy coating of objects in and under fresh 



