Table showing the Distribution of the Gmptolites in the Arenig 

 and Llandeilo Rocks of St. David's. 



Hhabdophora. 



Arenig. 



Lower. Middle. Upper 



PQ 



Didymograptus affinis, Nich. .. 



bifidus, Hall 



euodus, Lapw 



exfrensus, Hall 



furcillatus, Lapw 



indentatus, Hall 



— — , var. nanus, Lapw. . . 



■ Murchisoni, Beck 



JSTicholsoni, Lapw 



patulus, Hall 



pennatulus, Hall 



sparsus, Hopk 



Tetragraptusquadribrachiatus,J9a^ 



HaLli, Hopk 



Hicksii, Hopk 



■ serra, Brong 



Clematograptus implicates, Hopk.. 



Nemagraptus capillaris, Emm 



Dicellograptus moffatensis, Carr. . . 

 Climacograptus caelatus, Lapw. .. 



confertus, Lapw 



Diplograptus dentatus, Brong 



foliaceus, Murch 



tricornis, Carr 



Phyllograptus stella, Hopk 



Grlossograptus ciliatvis, Emm 



Trigonograptus ensiformis, Hall ... 

 truncatus, Lapw , 



Cladophora. 



Ptilograptus acutus, Hopk 



cristula, Hopk 



Hicksii, Hopk 



Dendrograptus arbuscula, Hopk. . . . 



: diffusus, Hall 



divergens, Hall 



flexuosus, Hall 



, var. recurvus, Hopk. ... 



— — persculptus, Hopk 



Rarasayi, Hopk 



serpens, Hopk 



C allograptus elegans, Hal I 



radiatus, Hopk 



radicans, Hopk 



Salteri, Hall 



Dictyograptus cancellatus, Hopk. . . 



Homfrayi, Hopk 



irregularis, Hall 



sp. ind , 



tf 



Llandeilo. 



Lower. Mid. Up 



Ab erei 



ddy 



10. 



Bay. 



