474 PEOF. E. J. GARWOOD ON THE LOWEE CAEBOXIEEROFS [DeC. I912, 



in a recent note on these organisms,' in commenting on the poor 

 mode of preservation usnally exhibited by these forms in the 

 Carboniferous Rocks, remarks : — 



'This imperfection of outline strongly suggests that replacement of the 



original substance by secondary calcite has taken place It is noticeable 



that some species of Calcispherae have left carbonaceous remains which suggests 

 that they too might have been chitinous in life.' 



Mr. McLean throws out the suggestion that these Calcisplierce may 

 have developed from'trne radiolaria by becoming adapted to brackish 

 waters. It is interesting to note in this connexion the invariable 

 association of the Calcispherce with abundant plant-remains in the 

 deposits of the jN"orth- Western Province (PI. XLYII, fig. 4). 



Fauna. 



Pemmatites constijMtus Hinde. 



Alveolites etheridgi Thomson. 

 Lit host rot ion martini Ed. & H. 



ArchcBocidaris sp. 



Sienopora compacta, sp. nov. Munro. 

 Cystodictya sp. 



Fenestella merahranacea (Phill.). 

 Fencstella nodulosa (Phill.). 

 Fenestella pleheia M'Coy. 

 Fistulipora incnistans (Phill.). 

 '^Hemitrypa hihernica M'Coy. 

 TahiiUpora sp. 

 Tolypora sp. 

 Jihahdomeson sp. 

 Bhomhopora sp. 



Chonetes cf. hardrensis Phill. 

 '^Athyris cf. expansa (Phill.). 

 Crania cf. quadrata (M'Coy). 

 Cyrtina carhonaria (M'Coy). 

 Productus corrugato-hem isphericus 

 Yaughan. 



Geographical distribution. 

 Raven stonedalc Districts. In the Westmorland Pennines, in the 

 Melmerby-Scar Limestone east of Roman Fell. 



(D) The Dibunophyllum Zone. 



The beds which succeed the Productus comigato-liemispJiericiis 

 Zone appear to correspond generally with the DihunoijhyUum Zone 

 of the South-Western Province. The highest limestones, however, 

 as, for instance, those at Botany, and possibly a portion of the 

 underlying Yoredale Beds, represent a horizon comparable to some 

 portion of the J), Beds of Derbyshire. The zone may be considered 

 under two divisions : — 



1 'A Group of Rhizopods from the Carboniferous Period' Proc. Camb.. 

 Phil. Soc. vol. xvi, pt. 6 (1912) p. 512. 



Productus laciniatus M'Coj'. 

 Prod.uctus cf. martini Sby. 

 Productus cf. maximus M'Coy. 

 Productus punctaius Mart. 

 Pugnax pleurodon (Phill.). 

 '^Pugnax pugnus (Sby.). 

 Ehynchotreta angulata (Linn.). 

 Seminula amhigua (Sby.). 

 Seminula ficoidea Yaughan. 

 Spirifer bistdcatus Sby. 

 Spirifer duplicicostus Phill. 

 Spiriferina laminosa (M'Coy). 



Myalina verneuili M'Coy. 

 Aviculopecten dissimilis Flem, 

 Pterino2yecten dumoutiamts de Kon.. 



Bellerophon scalifcr de Kon. 

 Capidus sp. 



Naticopsis plicisfria (Phill.). 

 Pleurotomaria sp. 



Pleuroplax woodi Davies. 



[*z= Pennine District.] 



Throughout the Shap and 



