16G Geological Society. 



investigation shall have been made. As elsewhere, embryo- 

 logy will give the best clue to its affinities. At present the 

 type of Mollusca and that of Vermes seem both to claim Neo- 

 menia as a distant relation, the latter perhaps with more 

 right than the former. Neomenia, however, presents consi- 

 derable deviations from both, in the absence of a radula, in 

 the structure of the alimentary canal and of the nervous sys- 

 tem, as also in other respects, as the form of the body and the 

 spines of the skin." 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 



March 12, 1879.— Henry Clifton Sorhy, Esq., F.R.S., 

 President, in the Chair. 



The following communications were read : — 



1. " On Conodonts from the Chazy and Cincinnati groups of the* 

 Cambro-Silurian, and from the Hamilton and Genesee-Shale divi- 

 sions of the Devonian, in Canada and the United States." By 

 G. Jennings Hinde, Esq., F.G.S. 



After a sketch of the bibliography of the subject, the author 

 described the occurrence of Conodonts. In the Chazy beds they aro as- 

 sociated with numerous Leperditke, some Trilobites, and Gasleropods ; 

 in the Cincinnati group with various fossils ; and in tho Devonian 

 strata principally with fish-remains ; but there is no clue to their 

 nature from these associated fossils. They possess the same micro- 

 scopic lamellar structure as the Russian Conodonts described by 

 Pander. The various affinities exhibited by the fossil Conodonts 

 were discussed ; and the author is of opinion that though they most 

 resemble the teeth of Myxinoid fishes, their true zoological relation- 

 ship is very uncertain. The paper concluded with a classification of 

 the Conodonts from the above deposits. 



2. " On Annelid Jaws from the Cambro-Silurian, Silurian, and 

 Devonian Formations in Canada, and from the Lower Carboniferous 

 in Scotland." By G. Jennings Hinde, Esq., F.G.S. 



After referring to the very few recorded instances of the discovery 

 of any portions of the organism of errant Annelids as distinct from 

 their trails and impressions in the rocks, the author noticed the 

 characters of the strata, principally shallow-water deposits, in which 

 the Annelid jaws described by him are imbedded. A description 

 was given of the principal varieties of form and of the structure of 

 tho jaws. They were classified from their resemblances to existing 

 forms under seven genera, five of which are included in the family 

 Eunicea, one in the family Lycoridea, and one among the Glycerea. 

 The author enumerated fifty-five different forms, the greater pro- 

 portion of which are from the Cincinnati group. 



