Notices of Memoirs. 323 



by squeezing or hammering, a movement whicb in inetals as 

 ^ general rule, as in marble, is facilitated by increase of temperature. 

 (6) There is therefore a flow of marble just as there is a flow of 

 metals under suitable conditions of pressure. (7) The movement 

 is also identical with that seen in glacial ice, although in the latter 

 case the movement may not be entirely of this character. (8) In 

 these experiments the presence of water was not observed to 

 exert any influence. (9) It is believed, from the results of other 

 ■experiments now being carried out but not yet completed, that 

 similar movements can, to a certain extent at least, be induced in 

 granite and other harder crystalline rocks, and that several structures 

 developed in these rocks in nature in highly contorted regions can 

 thus be reproduced. Photo- micrographs of the marble are given. 



IV. — Geology of West Cornwall. — Mr. J. B. Hill, who has 

 been studying the geological structures of Western Cornwall for 

 some years, has been talking to the Royal Geological Society of 

 Cornwall about them. His paper has appeared in the Transactions 

 (1901, vol. xii, pt. 6), and his conclusions, given in his own words, 

 are as follows : — " The structures of the stratified formations in 

 West Cornwall are identical with the structures of crystalline schists. 

 In the Falmouth district, so far as yet examined, true slates have 

 not been met with. The strata have been thrown into a series of 

 isoclinal folds, accompanied by small faults. With these folds and 

 faults minor structures have been set up until the whole rock has 

 often become a mass of minute folds and thrusts, with their 

 accompanying strain-slip cleavages. These processes have been 

 carried so far that ' crush-conglomerates ' have been produced on 

 a large scale. It is evident, from a study of this district, that had 

 the rocks been subjected to those stresses at a greater depth and 

 below the zone of fracture, where they would not have been so free 

 to move, they would have been converted into true schists. They 

 possess now every structure of schists, but the mineralization has 

 been wanting." 



" The visible dip of the rocks is of no value, except as registering 

 the inclination of the limbs of folds. As an illustration of this fact, 

 it may be pointed out that although the strata have a general dip to 

 the south-east, between Falmouth and Truro, we are apparently 

 crossing the strike from the coast to the heart of the county, yet, 

 instead of getting deeper in the stratigraphical series, we are on 

 precisely the same geological horizon as at Falmouth, the intei'vening 

 ground being made up of a succession of isoclinal folds." 



This last paragraph is, we believe, confirmatory of De la Beche's 

 view, and does not support the view sometimes expressed, that in 

 this district we have a great thickness of sedimentary deposits. 



V. — Argonaut from the Tertiary of Japan. — Mr. Yoshiwara has 

 just published in Annotationes Zoologic<B Japanenses (1901, vol. iii, 

 pp. 174-176) a description of a supposed new Argonaut from the 

 Neogene tuif of Agenokimura, near Matsue, Iiigori, province Izumo, 

 Japan. This was found by Mr. J. Asai, and mentioned by Professor 



