142 PROCEEDINGS OF THE 



far apart go far to illustrate the law, "that climatical zones 

 of animal and vegetable life are mutually repeated or re- 

 presented by elevation and latitude," although, according to the 

 author just named, the species in this case being identical, and 

 not representative, proves an accident not necessarily dependant on 

 the law. But how the transportation has been effected, and 

 whether from north to south, or vice versa, further investigations 

 alone can determine. 



May 29th, 1866. 

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

 Messrs WUliam Muir and John Dougan were elected resident 

 members. 



SPECIMENS EXHIBITED. 



Mr David Eobertson exhibited sj)eciDiens of a new crustacean 

 recently discovered by himself, and named by Mr Brady Cytheridea 

 Rohertsoniana.^ He mentioned that he had first met with the 

 species in the beginning of the present year, in the Glasgow and 

 Paisley Canal, between Eglinton Street Wharf and Pollokshields 

 Bridge, and had subsequently found it also in the Forth and Clyde 

 Canal, near BowHng. He had never observed it among plants, 

 where many of its allies are commonly met mth, but always at the 

 bottom, in mud, which is probably its proper habitat; and it 

 appears to prefer sandy or gravelly mud to the very fine soft mud 

 in which others of the same family are found abundantly. 



The Secretary then drew the attention of the meeting to a col- 

 lection of zoophytes forwarded from Dunbar by Mr John Jefii'ay, 

 correspondmg member — the most prominent species being Thuiaria 

 thuia, Antennularia antennina, Sertularia JiUcula, Flunmlaria falcata, 

 Campanularia dumosa, Sertidaria cd)eithm, Halecium muricatiim, etc. 



PAPERS READ. 



I. — Notes of a Botanical Excursion to Canlochan and Glas Mhiel in 

 July, 1865. By Dr James Stirton. 



He illustrated liis remarks by a collection of mosses from Can- 

 lochan — a deep and narrow glen in Forfarshire, and the source of 

 the River Isla. Amongst these Sjjlachnum vasculosiim was found 

 * Named by G. O. Sars Cylhcridca hcustris. 



