WTLMORE : CARBONIFEROUS LIMESTONE ZONES. 245 
ground of Elbolton and some part of Swinden Knoll, the upper 
beds of Cracoe, the rich coral b^ds of Rylstone, the upper beds of 
Crag Laithe, the Otterburn shales with limestone, the white 
limestone of Winter burn Reservoir, and the lower part of the 
great series of shales-A^th -limestones betAveen the Downham 
Knolls and the grits. 
Farther east, the beds at Dibbles Bridge, with C^^athophyllum 
regium, Lithostrotion irregulare, &c., the upper beds of TroUers 
Gill clearly belong to this zone. There can also be little doubt 
-about the richl}^ fossiliferous beds of Greenhow Hill with Lithos- 
trotion basaltiforme, L. irregulare, " Cyclophyllum " (two or 
more species), Dibunophyllum and Lonsdaleia. 
Some of the commoner fossils are : — 
Cladochonus sp. 
MicheHnea tenuisepta (Phill). 
Lithostrotion irregulare M. E. and H. 
L. portlocki (Bronn.). 
L. m'coyanum M. E. and H. 
CyathophA^llum cf. stutchburyi ? 
Caninia (or Diphjrphyllum) subibicina M'Coy. 
Dibunophyllum sp. 
Clisiophyllum sp. 
Zaphrentis amplexoides Wilmore (in the shales) 
Cyathaxonia riishiana Vaughan (in the shales). 
Productus giganteus (latissimus) Mart. 
Pr. striatus Fischer. 
Pr. edelburgensis. 
Pr. martini Sow. 
Schizophoria (Orthis) resupinata (mr. connivens) (Phill.) 
In the shales of S and D there are numerous caninoid or 
zaphrented forms which are probably mutations of Caninia 
comucopiae. I think it is highly probably that the Zaphrentis 
amplexoides which I described from Rylstone and which I have 
since discovered in other exposures is one of these descendants of 
Caninia cornucopiae. I am working at these forms and I have 
much material from various exposures awaiting, study and 
description.* 
* In aid of this and other Coral work, the Committee of the Royal Society kindly made me a grant. 
