44 Revieius — Invertebrate Palceontology. 



has made use of tlie work of British, petrologists since the issue of 

 the fourth edition in 1908, and has found it possible to illustrate 

 most of the important rock-types by examples drawn from home 

 and from the British Empire. Besides new material there is a certain 

 amount of rearrangement, noticeable especially in the chapters on 

 nepheline-syenites and phonolites and in the section devoted to 

 metamorphism. A number of new figures have been added, bringing 

 the total to 100. These are a most useful feature of the book, and 

 it is unfortunate that some of them have been printed off for this 

 edition in a manner that fails to do justice to the beauty of the 

 original drawings. We are glad to observe that Dr. Barker's book 

 is still sold at a price that brings it within the reach of every student, 

 while to the advanced worker it is equally valuable as a work of 

 reference and standard authority on its subject. 



Palaeontology (Invertebrate). By H. Woods, M.A., F.R.S. 

 5th edition, pp. 411, with 173 figures. Cambridge University 

 Press, 1919. Price 12s. 6d. net. 



A LTHOUGH this fifth edition of Mr. Woods's book is apparently 

 smaller than the last, it actually contains 23 more pages and 

 24 fresh figures. It has been revised throughout, additions and 

 modifications being made in most parts of the work. The section 

 on the Asterozoa has been to a large extent rewritten, so as to 

 bring it into accordance with the recent work of Dr. W. K. Spencer 

 on Palaeozoic starfishes. A revised account is given of the 

 distribution of marine moUusca at the present day. In the section 

 devoted to the Trilobites account is taken of the recent work of 

 Walcott on the appendages and of Ruedemann on the median 

 eye. The account of the Malacostraca has been amplified, and the 

 classification of Caiman and other recent writers adopted. The 

 work of revision must have been difficult owing to the extensive 

 additions to the literature of almost every group of invertebrates 

 since the appearance of the fourth edition, and the author is to 

 be congratulated on the successful manner in which he has dealt 

 with this. It is to be regretted that enhanced cost of production 

 has made such a considerable increase in the price necessary, since 

 some students of geology may thereby be deterred from buying this 

 indispensable work. 



Geological Society of London. 

 November 19, 1919.— Mr. G. W. Lamplugh, F.R.S., President, in 



the chair. 



The following communication was read : " The Pleistocene 

 Deposits around Cambridge." By Prof. John Edward Marr, 

 Sc.D., F.R.S., V.P.GS. 



