428 Reports and Proceedings — Geological Society of Loudon. 



from Balladonia " and " Pernio- Carboniferous Fossils from Byro 

 Station, Murchison District ". 



3. Molybdenum Ores op Canada. — Dr. T. L. Walker has prepared 

 a "E-eporton the Molybdenum Ores of Canada" (Dep. Mines, Ottawa, 

 1911). The ore most widelj' distributed is Molybdenite: there also 

 occur Molybdite and Wulfenite (raolybdate of lead). All information 

 relating to the subject has been gathered, and the author has personally 

 examined many of the Molybdenum deposits. 



4. Seismology. — We have received several numbers of the ^«//^<m 

 of the Seismologiccd Society of America, commenced in 191 1, under the 

 direction of Messrs. J. C. Branner, A. C. Lawson, and S. D. Townley. 

 While dealing particularly with phenomena observed in America, 

 notices are included of earthquakes in otlier parts of the world. In 

 jS'o. 4 (December, 1911), Mr. Lawson described some Post-Glacial 

 faults ; Mr. J. S. Diller contributes a memoir with portrait of 

 Major Clarence E. Diitton ; and there are various articles relating 

 especially to earthquakes, earthquake epicenters, seismographs, etc. 



5. Megascopic Pseudosteojiatism. — Mr. S. E-ennie Haselhurst 

 (Univ. Durham Phil. Soc, iv, p. 162, 1912) introduces the term 

 mentioned in describing the larger forms of structure produced by over- 

 foldiug and thrusting, shearini; and cleavage, as developed in shales and 

 micaceous sandstones in the Coal-measures of ^Northumberland. The 

 characters, which simulate fluxion-structure, appear to be similar 

 to those described by Dr. A. Strahan in the violently disturbed 

 Coal-measures on the Pembi'okeshire coast (see Summary of Progress 

 Geol. Survey for 1905, p. 60). 



6. AscTOTHERiuM FEOM YuKON. — A new species of this giant bear, 

 named Arctotherium yiikonense, has been described by Mr. Lawrence 

 M. Lambe [Ottatva Nat., xxv, p. 21, 1911). The specimen, a well- 

 preserved skull, was found at a depth of 40 feet in frozen Pleistocene 

 ileposits at Gold-run Creek, Yukon, and the discovery extends the 

 known range of this mammal very far to the north of any previous 

 record. The f:enus is regarded as intermediate between the old-world 

 Hymnarctos and Ursus. 



i?,e;:po:rts .i^nsriD :f'i?,ocee;idii^<3-S- 



Geological SociP:Tr of London. 



Jime 19, 1912.— Dr. Aubrey Stiahan, F.E.S., President, in 

 the Chair. 



The following communications were read : — 



1. "On the Geoloav and Palseontologv of the Warwickshire Coal- 

 field." By Ilobert Douglass Vernon, B.A., B.Sc, F.G.S. 



The main objects of this paper are to determine the true age of the 

 so-called ' Permian ' rocks of Warwickshire, and their stratigraphical 

 relationship to the underlying Carboniferous rocks and to the over- 

 lying deposits of Triassic age. Further, the Carboniferous rocks are 

 subdivided into groups, and the age of the subdivisions is determined 



