Mr. W. H. Baily on Graptolites and allied Fossils in Ireland. 241 



Dr. Meeyon inquired as to the implantation of the teeth in the 

 jaws of ffyperodctpedon, and suggested that the position and direc- 

 tion of the orbits were not accordant with terrestrial habits, and 

 also that the absence of processes on the ribs indicated a flexibility 

 of the body consistent with a fluviatilo mode of life. 



Prof. Huxley showed that no conclusion could be drawn from the 

 want of processes on the ribs or the position of the orbits as to the 

 habits of the animal, and remarked that the processes in Sphenodon 

 were not anchylosed to the ribs ; he considered it possible, but not 

 probable, that the jaws had a horny covering. He stated that in 

 using the term " poikilitic," he was desirous of indicating that, 

 while several marine formations with changing forms of life suc- 

 ceeded each other, the terrestrial fauna may, in certain cases, have 

 been continuous. He believed that terrestrial forms were at least 

 as persistent as marine. 



Dr. Cakrtttheks remarked that the Permian vegetation showed 

 mesozoic affinities, and in fact that the commencement of the Meso- 

 zoic flora was to be sought in the Permiau. 



January 27th, 1869. — J. Gwyn Jeffreys, Esq., F.B.S., Treasurer, 

 in the Chair. 



The following communications were read : — 



1. " Notes on Graptolites and allied Fossils occurring in Ireland." 

 By W. H. Baily, F.G.S. [First Paper.] 



After remarking that the Graptolites are now generally regarded 

 as belonging to the class Hydrozoa, the author detailed the various 

 localities in the south of Ireland in which they had been found, and 

 indicated the species occurring in each place. The localities are 

 situated in the counties of "Waterford, Wexford, Clare, and Tipperary ; 

 and the species are as follows : — 



Cladograpsus gracilis, Hall. 

 Diplegrapsus pristis. His. 



mucronatus. 



teretiusculus. 



deutatus, Brongn. 



Climacograpsus bicornis, Hall. 

 Dicranograpsus ramosus, Hall. 

 Cyrtograpsus gracilis, Hall. 

 hamatus, Baily. 



Didymograpsus sextans, Hall. 

 elegans, Carr. ( = D. flaccidus, 



Hall?, Nick.). 



caduceus, Salt. 



— -- Forchhamineri. 

 Graptolithus (sagittarius) Hisin- 



geri, Carr. 



Sedgwicki. 



tenuis. 



priodon. 



The most widely distributed of all is Diplograpsus jpristis, to which 

 the author thinks D. mucronatus and dentatus probably belong. The 

 fossils described by the author as Tlieca cometoides may probably be 

 the gonothecse of D. pristis, as had been suggested by Mr. Carruthers. 



2. " Notice of Plant-remains from beds interstratified with the 

 Basalt in the county of Antrim." By W. H. Baily, Esq., F.G.S. 



The deposit referred to by the author was discovered by the late 

 M. G. Y. Du Noyer in cuttings of the Northern Bailway of Ireland 

 near Antrim ; it consists of a layer from 4 to 8 inches in thickness, 

 separated by a conglomerate bed of 10 or 12 feet from the under- 

 lying basalt, and by earthy beds of about equal thickness from the 



