Oeological 8urvey Mem^t's — 85 



3. Zone of Belemnites fusiformis and Terehratula sella. Nos. 2 

 and 3 are Aptian. 



4. Zone of Belemnites minhmis. 



5. Zone of ScMonbachia inflata. Nos. 4 and 5 belong to the 

 Upper Gault ; the Middle Gault seems to be absent. 



The rocks referred to the Upper Cretaceous are only exposed at 

 ebb-tides ; they have hitherto been considered only to represent the 

 Upper Chalk with flints, but Dr. Dames has ascertained from the 

 fossils, partly in the rocks in situ, partly in the boulders, that the 

 Cenomanian is present with Terehratula depressa ; and of Turomau 

 a^e there is a reddish chalk with Lioceramus mytiloides ; a white 

 chalk with flints containing Lioceramus Brogniartt ; and a yellow 

 chalk with ScapTiites Geinitzi and Holaster planus. Of the 

 Senonian, three zones are represented, viz. that o? Inoceramus 

 lobatus, of Belemnitella quadrata, and of B. mueronata. No iertiary 

 strata are present. . ,i • ^ 



The observations of Dr. Dames have very materially increased our 

 knowledge of the geology of this interesting islet, and we are glad_ 

 to note that he has promised to bring out a detailed description ot 

 the fossils present in its rocks, which will be quite as highly 

 appreciated by British as by German geologists. r T H 



in.— Memoirs of the Geological Survey of the United King- 

 dom ; The Jurassic Rocks of Britain. Yol. HI. The Lias 

 OF England and Wales (Yorkshire excepted). By Horace 

 B Woodward, F.G.S., President of the Geologists' Association. 

 8vo. pp. xii. and 399, with a Map and 89 Woodcut Uhistrations. 

 (London: Kegan Paul, Trench, Triibner, and Co., Ld., 189o.) 

 Price 7s. 6d. 



IN the Geological Magazine for September, 1893, pp. 415-421, 

 we gave a notice of volumes I. and II. of this Memoir dealing 

 with the Jurassic Rocks of Yorkshire, by C Fox-Strangways 

 F G S. ; the present volume, comprising the Lias of England and 

 Wales, by Horace B. Woodward, F.G.S., is the first instalment ot 

 his work and forms an important and acceptable addition to our 

 knowledge of the Jurassic rocks of Britain, south of the Humber. 



"The present volume," says Sir Archibald Geikie, " has been 

 prepared entirely by Mr. Woodward. His training in the faeld- 

 work of the Survey had made him intimately acquainted with the 

 Jurassic rocks, for, between the years 1867 and 1874, he was en- 

 gao-ed under Mr. Bristow, the late Director for England and Wales 

 in "re-surveying the Secondary ^formations in the south-west ot 

 England and the south of Wales." , i r i 



In the introduction the author treats of the term Jurassic, and otthe 

 extent of these rocks in Britain, with their relation to the formations 

 above and below them. In dealing with the history of the Jurassic 

 rocks the place of honour is naturally given to William Smith, who, 

 in his earlier work, was specially identified with the Oolitic rocks ot 

 the south-west of England, and many of whose names are still re- 



