6o5 General Notes. ("July, 



tulous and sheathed with horn. The creature seems to have 

 been phytophagous, and its defensive weapons probably preserved 

 it until it finally fell before the Australian so-called " Aborigine." 



The memoir is illustrated with several plates. The Geological 



Magazine, April, 1882, contains contributions to the palaeontol- 

 ogy of the Yorkshire oolites, by W. H. Hudleston. This is one 

 of a series, and treats of the Gasteropoda. The zones which con- 

 tain Gasteropoda are the Dogger, with Ncrincea cingenda and 

 numerous other shells ; the Millepore bed; the Scarborough or 

 gray limestone; the Kelloway rock, with numerous Trigonias ; 

 the Oxford clay; and the lower Calcareous grit. Estuarine 

 beds separate the lowest four of these. In all the beds the Ceph- 

 alopoda are more conspicuous than the Gasteropoda. In the 

 same magazine are " Some Points in the Geology of Anglesey," 

 by Dr. Roberts, forming part of a discussion respecting the 

 nature of certain beds ; figures and descriptions of some fossils 

 from the red beds of the Lower Devonian, Torquay, by R. Ethe- 

 ridge ; a note on Homalonotus CJiampemozvnci, by H. Woodward, 

 with a figure of the tail ; remarks on the classification of the Euro- 

 pean rocks known as Permian and Trias, by the Rev. A. Irving ; 

 a continuation of W. Flight's history of meteorites; and the con- 

 cluding part of the life of Linnarson, by Professor Chas. Lap- 

 worth. Mr. Irving's paper is a review of the arguments respecting 

 " Permian," as it was named by Sir Roderick Murchison. In 

 Germany these rocks are known as the Dyas, and consist of" two 

 series of strata sharply distinguished from' each other, both petro- 

 graphically and palaeontologically," as remarked by Professor 

 Credner, of Leipzig. The argument will be continued in the next 

 number. Mr. Mudd suggests that what is known to engineers 

 as "water-hammer a ' 

 ducing the phenom 



> play ! 

 thquakes and volcanoes.- 



recent meeting of the Geological Society of London, Mr. D. 

 Macintosh remarked upon some additional discoveries of high 



level marine drift in North Wales. Professors King and Row- 



ney have recently published a work with a title too long to tran- 

 scribe, upon ophites in general and Eozoon in particular. The 

 reviewer of this work in the Philosophical Magazine states that 

 the structures figured by the authors have onlv a rough general 



resemblance to those claimed to be organic. In the American 



Journal of Science, Professor J. D. DaTia continues his series of 

 articles upon the flood of the Connecticut River valley from the 

 Quaternary glacier. Writing of the retreat of the glacier, he 

 gives a most interesting account of the present condition of 

 Greenland, with a shaded map of its surface. In the same pen- 

 od.cal Ben. K. Emerson describes the dykes of micaceous diabase 

 that penetrate the bed of zinc ore at Franklin Furnace, N. J- * nd 

 M. W. lies treats of the occurrence of vanadium in the ores at 

 Leadville. Mr. C. A. White explains the continuity of genet.c 



