148 Howard Fox — 8onie Devonian Fossils 



Igneous rocks are present on both sides of the entrance to Dinham 

 Creek, whilst at the inner end of the creek, south of the bridge 

 crossing the stream, there are several beds of limestone. These have 

 been noted by De la Beche on the Survey Map. 



5. Dinham Creek to Trewornan. 



In this tract of the shore the only fossils met with are Styliola, 

 the cast of a small Gasteropod, and several fragmentary specimens 

 of Orthoceras, which have been referred by Mr. Crick to 

 0. nassoviense, Foord, 0. gracile, Blum., 0. sp., intermediate between 

 0. rapeeforme, Roem., and 0. suhconicum, Roera., and a fragment of 

 a Bactrites. The low cliifs extending for about half a mile to- 

 Trewornan are composed of variegated unfossiliferous slates similar 

 to those in the cliffs between Pentire Haven and Rock. 



LIST OF FOSSILS FROM ST. MIXVER. 



Hitherto no list of the fossils from this particular area appears to 

 have been published, and it seemed therefore desirable to prepare 

 one which would be of service in comparing with the fossil faunas 

 from other parts of Cornwall, and also throw some light on the 

 particular horizon of the Devonian series to which they may be 

 referred. Not having the special knowledge or the requisite 

 opportunities for determining the fossils myself, I have again had 

 recourse to the assistance of my paleeontological friends who have 

 helped me in past years, and desire here to express my great 

 obligations to Dr. H. Woodward, F.R.S., who has described the 

 Trilobites, to Mr. G. C. Crick. F.G.S., for the determination of the 

 Cephalopods, to Dr. F. A. Bather, F.G.S.. for the description of 

 the new Ophiurid, to Dr. C. A. Matley, F.G.S., who had examined 

 the Brachiopoda, and to Dr. G. J. Hinde, F.R.S., for the list of the 

 Corals and Polyzoa. 



ACTINOZOA. 



Petraia spp. Casts of small cup-corals, probably representing two 



or more species. Common at Cant Hill, east of Cant Cove. 

 Zaphrentis sp. Depressed conical, at summit 20 mm. wide, 20 



principal septa, well-marked fossula. Cant Hill. 

 Amplexus (?) sp. Compound, branching, the branches diverge from 



a common stock, about 10-15 mm. in diameter and about 



150 mm. in length. Septa about 40, their interior characters 



not shown. Cant Hill. 

 CyatliophyUum sp. Cylindrical, 5-6 mm. in diameter, about 36 septa. 



Cant Hill. Rare. 

 Favosites sp. A small fragment on a slab with Atrypa reticularis. 



Cant Hill. 

 Alveolites sp. Plate-like growths, some measuring 70 mm. by 



50 mm., walls replaced by rusty material, corallites about 



0-5 mm. in width. Cant Hill. Common. 

 FacTiypora sp. Branching form, the branches about 5 mm. in 



diameter, and the corallites about 0-5 mm. wide. West of 



Com Head. 



