JRevietvs — G. H. Morton — Country around Limrpool. 565 



that it contains a considerable number of forms which are peculiar to it, 

 and impart to it the character of a zoo-geographical region of its own. 



The Muschelkalk of the main region of the Central Himalayas 

 is divisible into two portions : the lower ranges from three to six 

 feet in thickness, and is characterized chiefly by a Brachiopod fauna; 

 the upper has a thickness of from 15 to 40 m. or frojn about 50 to 

 130 feet, and has yielded a very rich Cejohalopod fauna. Dr. Diener 

 says that " so far as such palgeontological analogies may be per- 

 missible in correlating formations geographically so widely separated, 

 we may consider the main mass of the Himalayan Muschelkalk 

 to be an equivalent of only the Upper Alpine Muschelkalk of the 

 Mediterranean Triassic province." 



Nowhere in the Himalayan Trias have deposits of Norian and 

 Lower Carnian Age been met with between the Muschelkalk and the 

 Daone//a-beds, the uppermost bed of the Muschelkalk being con- 

 formably overlain by a limestone yielding an ylonoides - fauna. 

 Hence it would seem that possibly the Indian Muschelkalk is the 

 homotaxial equivalent of the Muschelkalk and of the Norian stage 

 of the Mediterranean Province, but Dr. Diener considers that our 

 present knowledge of the palaeontological evidence does not justify 

 us in this conclusion. 



The Triassic limestone of Chitichun occurs only in detached 

 blocks, and is lithologically entirely different from the Triassic beds 

 of the main region. Dr. Diener regards its fauna as of Muschelkalk 

 age, but belonging to a somewhat lower horizon than that of the 

 main region of the Central Himalayas. 



Both memoirs are illustrated by numerous excellent plates, and 

 form a most important contribution to our knowledge of the Indian 

 Triassic Cephalopoda. We look forward with interest to Dr. Diener's 

 work on the rest of the Triassic Cephalopoda of these regions. 



IV. — The Geology of the Country around Ltverpool, including 

 THE North of Flintshire. With Appendix and Geological 

 Map of the District. By G. H. Morton, F.G.S., etc. New 

 Edition. 8vo ; pp. 319, with 22 Plates and 15 Woodcuts. 

 (G. Pliilip & Son: London and Liverpool, 1897.) 

 S a veteran resident geologist, the author has long been ac- 

 customed to note and collect everything remarked by himself 

 and others about his favourite subject of research, namely, the 

 geological history of the district within a radius of about twenty 

 miles around Liverpool, but for the most part limited to places within 

 about twelve miles. The first edition of this work, issued in 1863, 

 was reviewed in The Geologist, vol. vi, p. 478 ; the second edition 

 was reviewed in the Geological Magazine, Dec. Ill, Vol. VIII, 

 p. 226. The present edition begins with a reprint of the "Preface 

 to the Second Edition," dated 1891; and the "Preface to the 

 Appendix," at p. 291, accounts for the additional six years, in 

 which much local information has accrued for the production of 

 this "New Edition" (1897). 



A list of the principal works and papers on the geology of the 



