NATURAL HISTORY SOCIETY OF GLASGOW. 91 



factory evidence of the correctness of Mr Young's previous 

 researches on the clay beds at present washed by the tides. At 

 the same time, Mr Robertson exhibited several genera of Polyzoa, 

 and numerous remains of Crustacea, which he had also obtained 

 at Paisley, associated in the same beds with these minute 

 organisms. 



Mr Home had on the table a large collection of glacial shells 

 from a portion of the Clyde beds, occurring between Cardross and 

 Helensburgh, in connection Avith which it is somewhat remarkable 

 that a large projjortion of the shells are found quite entire, both 

 valves being united in the case of the Pedens, Cyprinas, and Pano- 

 pceas. Mr Home had obtained hundreds in this state of preser- 

 vation; and he remarked that the same fact could not be observed 

 at any of the other beds he had visited. 



Mr James Ramsay exhibited specimens of Bromiis secalinus from 

 Braidbar, near PoUokshaws, where he had gathered it apparently in 

 a wild state; also an abnormal form of Athyrium Filix fcemina from 

 Buchanan Woods, near DrjTuen, presenting a most extraordinary 

 deviation from the usual form of the species. To illustrate the 

 singular variety to which this fern is occasionally subject, Mr 

 Peter Clark, of the Royal Botanic Garden, had on the table seven 

 abnormal forms of a plant in a living state, one of the most inter- 

 esting of which was from the banks of Lochfyne. 



Mr Alexander M'Kiulay exhibited the following mosses from 

 Ben Voirlich, by Loch Lomond : — Fissidens rupestris, Wils. MSS., a 

 new species recently detected in North Wales, by Mr Wilson, 

 author of the "Bryologia Britannica;" it is closely allied to, and 

 has probably been confounded with, F. aclimiMdes, but is of much 

 smaller size, grows in drier situations, and has more pellucid leaves, 

 having the margins below distinctly thickened ; also, a new species 

 of Campylojms (C. aurimlatus), which he had discovered in 

 September last, and on a second visit to Ben Voirlich this month, 

 had again found in many places profusely, particularly near the 

 summit of the hill. This species is intermediate in many of its 

 characters between C. Jlexuosus and C. fragilis, but more resembles 

 the latter in habit, and sometimes also in colour; the nerve is 

 generally very broad, and has a layer of large cells over the front, 

 and is lamellated on the back, appearing in a cross section regularly 

 and distinctly crenate; the alar cells, of a bright red colour, are 

 expanded into articulate processes. It propagates itself by throw- 



