338 TRANSACTIONS, NATURAL HISTORY SOCIETY OF 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 Paleontology, 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, hooklets, 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 injthe 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. 
Notes and Descriptions of New Species of Scotch Car- 
boniferous Conodonts. By Grorce 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 large percentage of phosphate of lime.—J. 8. 

