NATURAL HISTORY SOCIETY OF GLASGOW. 169 



his permission were presented by Mr Kirsop to the Hunterian 

 Museum. 



Mr John Young, F.G.S., showed a series of small turbinated 

 corals from the weathered limestone, found at Cunningham Bed- 

 land, near Dairy, varying in size from a quarter to half an inch in 

 length. These corals apparently belong to the genus Cyathaxonia, 

 and are characterized by their deep cup or calice, prominent 

 central columella, and by having the septa well marked, and 

 continuous from the outer edge to the bottom of the calice. 

 One species of this genus, Cyathaxonia cornu, Michelin, has al- 

 ready been noted in the catalogue of the Western Scottish 

 Fossils, Glasgow, 1876, as being found in the limestone 

 shales at Brockley, near Lesmahagow, but it probably differs 

 from the species found at Dairy in not being adherent. Prof. 

 Milne Edwards and Prof. De Koninck describe the genus 

 Cyathaxonia as being adherent by its base in some species and 

 being free in others; C. cornu being free, C. KonincU being 

 adherent. Mr Young said he was therefore inclined to identify 

 his specimens with this latter form. Those exhibited from 

 Cunningham Bedland seemed to have become adherent in 

 nearly every instance to the spines of Froducti, the groove of 

 attachment to the spines being well seen in most specimens. 

 In a few specimens, Mr Young had found the outer theca of the 

 corallum completely encircling the spine of the Productus, which 

 had since been dissolved away, leaving an open tube through 

 which he had passed strong hair bristles to represent the spines. 

 The carbonate of lime in these corals had since their entomb- 

 ment been replaced by silica, which had resisted the weathering 

 influences of the air ; hence the specimens show their deep cup 

 and internal structure very clearly. The only other adherent 

 turbinated corals he had yet seen from our Scottish Carbonifer- 

 ous strata were two specimens found by Mr David Eobertson 

 at Shiells quarry, near East Kilbride, but they, from their 

 difference in size and broad base of attachment, evidently belong 

 to a different genus from Cyathaxonia. 



Mr Young exhibited two other groups of small turbinated 

 corals belonging to the genera Lophophyllum and Zajyhrentis, 

 which showed no attachment by their theca, even in the most 

 perfect specimens. He therefore concluded that not only these 



