228 REPORT—1904. 
slate consisting of two portions—the lower grey or Upper Devonian, 
the upper black or Pendleside or Upper Carboniferous. There is no 
evidence of an overlap, but it must be remembered that the rocks of 
South-west Cork are nearly vertical, and have been much moved, and I 
believe the Upper or Posidonomya beds and part of the Carboniferous 
Limestone is a synclinal with the limbs absolutely in contact, so that the 
beds in the centre are doubled on themselves. 
During last winter Mr. J. G. Hamling, F.G.S8., of Barnstaple, kindly 
sent me for examination a large suite of fossils collected from the Coddon 
Hill beds of the Lower Culm. These so interested me that I felt it neces- 
sary to visit the locality, which I did under his skilled guidance. The 
Lower Culm of North Devon consists of two series of rocks, neither of 
them apparently very thick, but much folded and repeated. The Coddon 
Hill beds are thin laminated, white or fawn-coloured silicious beds, with 
the following fauna :— 
TRILOBITES— 
*Phillipsia polleni? . : , : ‘ . H. Woodward. 
- spatulata . : : . P . H. Woodward. 
Proétus coddenensis . : : : : . H. Woodward. 
*Paleacis humilis - : d : . Hinde. 
Plewrodictywm dechanianum : 3 . Kayser. 
Petrea, ck. P. pauciradialis : : ~ éehillsp; 
* Productus plicatus . : : : : . Sarres. 
* Chonetes laquessiana . E E : : . de Kon. 
* Ortholetes crenestria . ; : : ; . Philly sp: 
*Athyris ambigua. 
ugk olecanites compressus . - ; : - Sow., sp. 
+ mivololus ‘ ; ; : » }Phillsp: 
Sphc Be sp. 
*? Stroboceras sulcatus ‘ . ; . Phill. sp. 
* 2? Nomismoceras spirorbis. or ees 
*Chenocardiola footit . : ; : 5 . Baily, sp. 
Radiolarians. 
Crinoid stems. 
Those species marked with an asterisk (*) occur in the lower part of 
the Pendleside series. 
The other beds of the Lower Culm are the Venn Limestones, a’ series 
of black carbonaceous limestones, with 
Posidonomya becheri, Low. Glyphioceras crenistria, Phill., sp. 
Pseudamusiwm fibritloswm, Salter, sp. Py sphericum, Phill. sp. 
Glyphioceras spirale, Phill., sp. Orthoceras sp. 
It is a point of difference amongst writers on the Culm as to whether 
the Posidonomya limestones are above or below the Coddon Hill beds. 
I believe for stratigraphical reasons that the Coddon Hill beds are at the 
base and the Venn Limestones succeed them, and also because the 
Paleontological succession in Derbyshire has beds with Prolecanites 
compressus at the base and Posidonomya Becheri immediately above 
them. In my paper in the ‘ Geological Magazine,’ op. ae cit., I have - 
gone into the stratigraphical question in detail. 
Immediately overlying the Postdonomya beds, if I am correct, are a 
series of Middle Culm grits, with occasional vegetable remains, what I 
consider to be the homotaxial equivalents of the "Millstone Grit, because 
they are intercalated between beds with Prolecanites compressus and 
Posidonomya Becheri and the series of clays and shales which are well 
a 
