3o6 NATURAL SCIENCE. Oct.. 1893. 



molluscan adults are duly noted in the bibliography, the standard 

 work by Troschel, " Das Gebiss der Schnecken," has been omitted. 



The treatment of the subject matter of the work, as evinced by 

 the portion before us, leaves little, if anything, to be desired, and the 

 plates are most excellent. It is to be hoped that the work will not 

 take as long to complete as some other Teutonic productions that 

 could be named. 



Mr. H. a. Pilsbry has completed and issued the last part of 

 vol. xiv. of Tryon's " Manual of Conchology." The volume is 

 illustrated with 68 plates, and is prefaced by a general account of the 

 structure and classification of the Chitons. An index to these 

 molluscs will appear with the next part, which completes their 

 description. 



The last part (fasc. v.) of Professor A. de Lapparent's " Traite 

 de Geologic" (pp. 1281 to end) has been issued by F. Savy, Paris. 

 Messrs. Macmillan & Co. announce the preparation of a third edition 

 of Sir Archibald Geikie's well-known Text-book. 



Messrs. W. H. Allen & Co. will shortly publish a new edition 

 of " Our Reptiles and Batrachians," by Mr. M. C. Cooke, which has 

 long been out of print. The work has been revised and corrected to 

 date by the author with some additional matter. The coloured plates 

 are reproduced in chromolithography. 



The same publishers have also nearly ready for publication a 

 " Handbook of British Hepaticae," by Mr. Cooke, with introduction 

 and full description of all the genera and species hitherto found in the 

 British Isles, illustrated by 200 woodcuts and seven plates. The work 

 will be the only complete guide to the subjects which has been 

 published in this country for upwards of a quarter of a century. 



