338 TRANSACTIONS, NATURAL HISTORY SOCIETY OP GLASGOW. 



who remarked on the resemblance of some of the Conodonts to 

 the teeth of the Hag-fish (Myxine) {Quar. Jour. Geol. Soc, 1879, p. 

 355); and the late Prof. Owen, in his Paloeontology, 1870, states, 

 from a microscopic examination, that Pander's genera Ctenog- 

 nathus, Cordylodus, and Gnathodus, had some claim to Vertebrate 

 rank, but they might be only the remains of the dentated claws 

 of Crustacea. In his second edition he concludes that they have 

 most analogy with the spines, booklets, or denticles of naked 

 molluscs or annelids. On this Dr. Hinde remarks (Quar. Jour. 

 Geol. Soc, Aug., 1879, p. 356), "That, however, the Conodonts 

 cannot be referred to the horny jaws of annelids may be con- 

 clusively shown by the discovery by the writer of these an- 

 nelidian structures in]the same strata with Conodonts, from which 

 the former can readily be distinguished by their chemical com- 

 position and their resemblance to the jaws of existing annelids. 

 Against the probability of the Conodonts having been the teeth 

 of molluscs it may be noted that the former are principally com- 

 posed of carbonate of lime." * 



These observations of Dr. Hinde I can confirm from having 

 found specimens of annelid jaws in Scotch Carboniferous strata, 

 and from the Wenlock shales of England. 



JYotes and Descriptions of New Species of Scotch Car- 

 boniferous Conodonts. By George Jennings Hinde, 

 Ph.D., F.G.S. 



At your request I have examined the beautiful collection of 

 Conodonts which you have discovered in the Carboniferous strata 

 of various localities in Ayrshire, and have compared them with 

 the forms which occur in the Silurian, Devonian, and Carboniferous 

 rocks of Canada and the United States, and also with the figures 

 and descriptions of the same bodies from the similar formations 

 in Russia, which have been described by Pander in his mono- 

 graph; and I now send you a few notes respecting them. 



These Scotch Carboniferous Conodonts are met with in a wonder- 

 fully perfect state of preservation. In all the specimens the surface 



* From their appearance and state of preservation I should think that 

 they must contain a lar^e percentage of phosphate of lime. — J, S. 



