PALHOZOIC ROCKS IN CANADA AND SCOTLAND. 389 
Fig. 19. Arabellites politus, H.: x 15. Kiviére au Sable. (Hamilton). 
20. similis, var. arcuatus: < 18.. Krom the Lower Carboni- 
ferous of Scotland. Riviére au Sable. (Hamilton.) 
21, 22,23. Hunicites affinis, H. Cwlts, Fifeshire. (Lower Carboni- 
ferous. ) 
24. Arabellites scoticus, H.: x 1C. Cults, Fifeshire. (Lower Car- 
boniferous.) 
Discussion. 
Dr. Woopwarp expressed his admiration of the labour and re- 
search displayed in these papers. He was satisfied that the conclu- 
sions as regards the Annelid jaws were correct ; but that the Cono- 
donuts belonged to Myxinoid fishes, he thought was more doubtful, 
and he suggested that they might possibly be the lingual armature 
of Nudibranchs. Though some of the Annelid jaws were not unlike 
the maxillipeds of Crustacea, the Conodonts had no such resemblance. 
Dr. Hicxs asked if the author had examined earlier formations 
than the Chazy and Cincinnati groups for remains of this character ; 
for Annelids were very abundant in the Cambrian epoch, though 
they had apparently left no remains in the form of jaws. 
Rev. J. F. Braxn said he had a fossil impression of an Annelid 
from the Ludlow rocks near Llandovery. 
Mr. Hinve said he had not found remains earlier than in the rocks 
which he had described. 
