540 PROF. E. J. GARWOOD OX THE LOWER CARBONIFEROUS [DcC. IQl 2, 



interesting to note that the Nodular Girvanella Band, which is 

 very characteristic of the base of the sub-zone elsewhere, is also 

 present in this district. This sub-zone includes the beds from the 

 summit of the Melmerby-Scar Limestone up to the top of the ' Jew ' 

 Limestone inclusive. The fauna is similar in all respects to that 

 which characterizes the Lonsdalia Beds in the Sliap District. 



The Saccammina^di.ndi appears to be represented by the Tyne- 

 Bottom Limestone, which is well exposed on the eastern flank of 

 High-Cup Gill. Here, as in the Shap District, the horizon is 

 marked by the abundance of Productus edelburgensis, associated 

 with Zaphrentis a if. consiricta Carr. MS. 



The higher beds of the Upper Dihunophyllum Sub- 

 zone, overlying the Tyne-Bottom Limestone, are much more 

 fossiliferous than is the case in the Shap District ; thus, in Great 

 Eundal Beck, the shale overlying the Scar Limestone contains, 

 the following forms : — 



Cyaihaxonia cornu Mich. j Fenestella plebcla M'Coy. 



B'dmnophyllum muirheadi Nich. & Flstulvpora incrustans (Phill.). 

 Thomson. 



Glauconome sp. 



Lingula squamiformis Pbill. 

 Orhiculoidea nitida (Phill.). 

 Cliothyris royssi (L'ETeille). 

 LeptcBiia analoga Phill. 

 Tugnax pugnus (Mart.). 

 Bhi2ndomella michelini (L'EveilJe). 



Diphyphylkim sp. boy. 

 Zaphrentis costata M'Coy. 



Cyathocrinus sp. 

 Platycrinus sp. 



Fenestella memhranacea (Phill.). 

 Fenestella nodulosa (Phill.). 



The presence of Cyatliacvonia cornu at this horizon is of interest, 

 and may possibly indicate that we have here reached the base of 

 the Cyathaxonia Beds of Dr. Sibly's Derbyshire sequence. At the 

 same time, it must be admitted that Cyathaxonia is rare in the 

 Pennine Area, and has not been definitely met with in the other 

 districts. 



The Middleton-in-Teesdale District. 



In Upper Teesdale the local base of the Carboniferous is exposed 

 between High Force and Cauldron Snout. Here a shaly conglomerate 

 crops out under Falcon Clints, on the left bank of the Tees above 

 Widdybank Farm ; it cannot lie far above the Lower Palaeozoic 

 floor, and is represented on the Geological Survey map as resting on 

 felsite and Ordovician slates north of the farm. Above this con- 

 glomerate occur grey shales which have been much metamorphosed 

 by the intrusion of the Whin Sill, with the production of the inter- 

 esting pisolitic structures described by Mr. Hutchings.^ The base- 

 of the overlying limestone has also been much metamorphosed 

 with a development of garnets. 



^ Geol. Mag. dec. 4, vol. ii (1895) pp. 122 et seqq. 



