82 Dr. Ivor lliomas — Devonian Fossils, Cormvall. 



There are also several examples of Lepidostroliis, and, in some of the 

 shales, masses of rootlets, of unknown affinity, are conspicuous. 

 The following is a list of the species which were recorded : — 



FiLlCAliES OR Pteridospeems. Mar iopter is muricata {^cYAoih .) . 



Sphenopteris ct. S. Laurenti, Andrse. Dictyopteris sub-Brongniarti, 

 Neuropteris acuminata (Schloth.). Grand'Eury. 



N. heterop)hylla, Brongn. Lycopodiales. 



N. obliqua (Brongn.). Lepidodendron obovatum, Sternb. 



N. gigantea, Sternb. L. lycopodioides, Sternb. 



Alethopteris loiicJiitica (Schloth.). L. sp. 



A. decurrens (Artis). Lepidophloios laricinns, Sternb. 



A. davreuxi{?) (Brongn.). Lepidostrobus sp. 



This flora is quite a typical Middle Coal-measure assemblage, and 

 there is thus no doubt that the coals worked at the Newfield pits 

 belong to that horizon. Several of the species are unknown from 

 the Lower Coal-measures, especially Alethopteris Bavreuxi (Brongn.) 

 and Lepidophloios laricinus, Sternb. Dictyopteris suh-Brongniarti, 

 Grand'Eury, have been recorded only from the Middle Coal-measures. 



As a whole the Ingleton Coal-measures seem to be closely related 

 to the Yorkshire Coal-field, and all the species recorded here, except 

 Dictyopteris sub-Brongniarti, Grand'Eury, are already known from 

 that coal-field. 



YI. — New Devonian Fossils from Cornwall. 



By Ivor Thomas, D.Sc, Ph.D., F.G.S. 

 (Communicated by permission of the Director of the Geological Sui-vey.) 



A SHORT time ago a Devonian fossil of considerable interest was 

 found in the grits of the Ladock neighbourhood. It had been 

 found hy a workman in a road-heap on the Grampound lload and was 

 placed for preservation in the Truro Museum. A cast was kindly 

 made by Mr. C. Davies Sherborn and presented to the Museum of 

 Practical Geology [22466]. This fossil was named Orthis sp., and is 

 referred to as such in the Memoir of the Geological Survey on the 

 geology of the country near Newquay (p. 35). 



More recently Messrs. C. Davies Sherborn and Upfield Green were 

 fortunate enough to secure another example of this Brachiopod from 

 the Ladock quarry. Mr. Uptield Green succeeded through patient 

 developing of the second specimen in exposing the muscle impressions 

 of one valve, and this has justified the previous allocation of the 

 specimens to Orthis. The second example has been presented by 

 Mr. C. D. Sherborn to the British Museum (Nat. Hist.). 



Though the preservation of the specimens leaves much to be desired, 

 it is considered advisable to publish this note in order to induce 

 further careful search in a locality hitherto considered to be practically 

 unfossiliferous. 



Firat example. — This shows the two valves in conjunction, with 

 prominent umboues and well-developed area in the brachial valve. 

 The latter has a broad sinus, due probablj- in part to deformation, as 

 the opposite valve has no appieciable fold. The surface is ornamented 

 with strong costae, which are widely spaced, the breadth of each 



