NATURAL HISTORY SOCIETY OF GLASGOW. 191 



to Annelides, some to Crustaceans, and others to fishes. Along 

 with the spicules and Conodonts there were also found, in some 

 abundance, scales and teeth of placoid and ganoid, and vertebral 

 bones of osseous, fishes in fine preservation. While therefore some 

 of the forms of Conodonts may be referred to Annelides and 

 Crustaceans, the large number of fish remains found in the deposit 

 is a strong argument for the greater portion of them having an 

 affinity with that family. The quarry at Laigh Baidland, which 

 is in the lower limestone, has never been of large extent, and has 

 not been worked for many years; the strata exposed are therefore 

 of limited extent. The remains are found in a dark-coloured 

 shale interbedded with the limestone, which, in its weathered 

 condition, is of a deep chocolate colour — due to an infusion of iron, 

 or probably manganese. The decomposed limestone obtained from 

 the fissures does not contain many organisms. There is abundance 

 of Lithodendron junceum; Heterojihyllia mirabilis, with portions 

 of the hooklets attached, sparingly; plates of two species of 

 Archaeocidaris ; portions of various Crinoids; four species of 

 Entomostraca of the genera Cyther-e, Baiixlia, and Lejierditia; 

 one species of Polyzoa, Diastopora megastoma ; and remains of 

 Productus and other Brachiopods, with a few univalve shells, but 

 these are in limited quantity and not well preserved. 



Mr. Arthur Pratt showed a series of mounted specimens from 

 the same locality, among which was an example of a small species 

 of Trilobite. 



After some observations by the Chairman, 



Mr. John Young, F.G.S., remarked upon the care with which 

 Mr. Mason had worked out the Microzoa from this deposit, and 

 stated that upon the slides exhibited would be found many 

 organisms of interest which had not been obtained in such 

 abundance in any of the other quarries of the district. Amongst 

 them was a fine series of the anchoring rods of the Glass Sponge 

 (Hycdonema Smithii), first discovered in the limestone strata of 

 this district, and numerous vertebral bones of small fishes. Mr. 

 Young stated that, from no other locality in which the remains 

 of Conodonts had yet been noted, had similar small vertebrae 

 been recorded. They are here found varying from half a line to 

 one-eighth of an inch in diameter ; and being free from the matrix 

 and finely preserved, their form could be clearly ascertained. He 

 was in hopes that the finding of these vertebrae and other small 



