Geological Society of London. 417 



A careful examination of a large series of sections and weathered 

 specimens of Corals from near the base of the Carboniferous series 

 at Lesmahago, etc., which have hitherto been referred to the genus 

 Aulophyllim, E. and H., has convinced the authors that A. fimgites, 

 and A. Bowerbanhi must be referred to a new genus, which they 

 propose to name Gyclocyathus. It differs from AidopTiylliim in having 

 a more or less essential columella of a very complicated structure, 

 while that genus was described by its authors as devoid of any such 

 structure. One form in the series of specimens examined by Dr. 

 Duncan and Mr. Thomson exhibited no columella, and the space 

 which would otherwise have been occupied by it was covered in by 

 successive tabulae ; they therefore referred it to Aulophyllum, under 

 the name of A. Edwardsi. 



2. "On the discovery of a new Pulmonate Mollusk (Conidus 

 prisms, P. P. Carpenter) in the Coal -formation of Nova Scotia." 

 By J. W. Dawson, LL.D., F.E.S., F.G.S. 



Some crushed specimens of the little shell described in this paper 

 were found in a bed of clay, associated with numerous individuals 

 of Pupa vetusta, between coals No. 37 and No. 38 of the Joggins 

 section, during a search undertaken for the purpose of discovering, 

 if possible, traces of land-animals in addition to the Pupa already 

 known. On submitting these specimens to Dr. P. P. Carpenter, they 

 were referred by him to the group Conulus, — a sub-genus of Zonites ; 

 and he has added to Dr. Dawson's paper a description of the characters 

 which they present. 



3. " On some tracks of Pteraspis (?) in the Upper Ludlow Sand- 

 stone." By J. W. Salter, Esq., A.L.S., E.G.S. 



Impressions upon two slabs discovered by Mr. E. Banks in the 

 Downton or Upper Ludlow Sandstones of Kington, Herefordshire, 

 were described by Mr. Salter as the tracks of Pteraspid fish. His 

 reasons for assigning this origin to the imprints were partly based 

 upon their character, and partly on the fact that the Pteraspis was 

 the only known creature of the period capable of making the im- 

 prints. He was of opinion that the tracks were produced by fish 

 endowed with stiff defences to their pectoral or ventral fins. Whether 

 the Pteraspis possesses such defences he was not aware, though he 

 thought it not at all improbable. 



4. " On a new Lingulella from the red Lower Cambrian rocks of 

 St. David's." By J. W. Salter, Esq., A.L.S., F.G.S., and H. Hicks, 

 M.D. 



Until very recently not a vestige of any organic remains had 

 occurred in the red rocks of the Lower Cambrian series. The fossil 

 now in question, which has been obtained from these deposits, is 

 unquestionably a Lingulella ; and although apparently of the same 

 species as one which Mr. Salter names Lingidella ferruginea, very 

 common in the lowermost of the layers which have yielded Para- 

 doxides, this older form is distinguished by the varietal name of 

 L. ferruginea var. ovalis, Hicks. 



5. " Observations on certain Points in the Dentition of Fossil 

 Bears, which appear to afford good diagnostic characters, and on the 



VOL. IT. — NO .XXXIX. 27 



