KOCKS OF SOUTH DEVON. 507 



forms iu them. Several new fossil finds in 1889 have enabled me 

 to extend the Upper-Devonian districts very much further. 



1. Massive Limestones *. 



The limestones of Petitor, part of the Kingsteignton mass, the 

 Chudleigh limestone, the dgbrooke-Park limestone in part, the 

 Oldchard limestone in part, the Ideford limestones, and the upper- 

 most part of the Kingsteignton mass, may be regarded as Upper 

 Devonian ; as also certain rather thin-bedded limestones on Elbury 

 \Yarren and perhaps portions of the limestones south of Goodrington. 



The Cuhoides-'bGdiS form a lower Prasnian horizon than the 

 Groniatite-beds ; and the massive limestones of Chudleigh, Oldchard, 

 and Kingsteignton are directly overlain by the red, compact, con- 

 cretionary Goniatite-limestones ; whilst the red slates of Petitor 

 combe, at their junction with the Petitor limestones, contain red 

 shaly limestone with Goniatites, and also famished imperfect Gonia- 

 tites. Again the Pamsleigh limestone is irregularly bounded near 

 East-Ogwell Mill by slates resembling those of Saltern Cove, and 

 iu East Ogwell by dark slates containing Entomis. The Wool- 

 borough limestone is partly bounded by slates of Upper-Devonian 

 types. 



The Bradley-Manor limestone, near Newton-Abbot, is also 

 bounded on the north by Upper-Devonian slates. The Barton 

 limestone, near Marychurch, is nearly surrounded by slates of the 

 Saltern-Cove type. The junctions of these limestones with the 

 Upper-Devonian slates are so often abrupt and irregular that they 

 suggest coralline growths at a much more rapid rate than muddy 

 sedimentation on their immediate borders, so that Upper-Devonian 

 slates might be banked against Middle-Devonian limestone in places. 



Dr. Kayser's list from Lower-Dunscombe quarry below the 

 Goniatite-beds, in light crystalline limestone, is : — 



Ehynchonella cuboides. 



acuminata 



Atrypa reticularis. 

 Athvris concentrica. 



Spirifer bifidus, 

 Productus subaculeatus. 

 Oonocardium. 

 Harpes. 



In a small quarry in the Ideford limestone, near Coalmansford, 

 I obtained Rhijnclioyiella ; comp. Camarophoria formosa, Schnur, and 

 Bh. near to parallelippeda^ identified by Dr. Kayser, who remarks 

 " Wohl Oberdevon=Cuboides-Kalk." 



The Goniatite-beds near Whiteway Farm rest upon a limestone 

 exactly similar to that of Chudleigh, in which I found a small 

 Spirifer (bijichis'?)^ Goldius granulatus, OyatJiopJii/Uum hexagoinmi, 

 and Fenestella. 



* Partly Middle Devonian, under which head the same limestones have also 

 been alluded to. I do not think it is possible to draw an arbitrary boundary be- 

 tween Middle and Upper Devonian, below the shaly Goniatite- limestones, in 

 South Devon ; nor is it possible in dealing with the massive limestones to con- 

 fine the description of such limestones to particular headings. Any apparent 

 confusion in arrangement is strictly in accordance with the state of the case. 



