192 BiliUojraphtcnJ Notices. 



entirely neglected the stiulj of surface-preparations of tliis 

 kind, and conse((uently tiie conditions which arc here 

 described were almost completely ignored by him. In the 

 present brief communication I am unable to make further 

 reference to the literature of the subject. 



BIBLIOGRAPHICAL NOTICES. 



A Catalogue of British Jurassic Gasteropoda. By "SV. II. Hudleston, 

 M.A., ' F.li.S., P.G.S., and Edward Wilsox, F.G.S. 8vo, 

 Pp. xxxiiiand 147. Dulau and Co. : London, 1892 (November). 



The very aspect of tlie pages of this book reminds a working Geolo- 

 gist of the well-known ' Morris's Catalogue of British Fossils,' even 

 •without the allusion in the Preface to the latter still useful book, 

 though it has long been out of print. This new Catalogue, however, 

 is limited (as its Title intimates) to one Mollusean group of one 

 Formation, and has very good additional features in its lists of 

 localities, bibliographic catalogues, table of genera, notes on some 

 genera and on doubtful and rejected species. Moreover, the syno- 

 nymy and references arc far more Uberally represented than in the 

 former work. 



The plan of this Catalogue is clearly laid down in the " Explana- 

 tory Xote,'" pp. xi-xvi ; and the palaiontological bearings both of 

 the whole group and of its divisions are treated of in the Preface, 

 pp. v-x. 



The long experience and the accurate knowledge of the two ener- 

 getic Authors may be well trusted for the satisfactory fulfilment of 

 the task they have undertaken aud brought to publication in this 

 work ; and their nomeuclatorial and general literary stylo and 

 method are decidedly good. Great pains have evidently been taken 

 to have quite correct printing ; and severe judgment has evidently 

 been exercised in coming to a conclusion in cases of doubtful priority, 

 in choosing the best and most necessary references, and in deter- 

 mining the synonymy. 



Sixty-five genera and subgenera of British Jurassic Gasteropoda, 

 •with their frequently numerous species (122 in Cerithinm and 78 in 

 Pleurotomaria, for instance), constitute the chief material here 

 reduced to zoolocical order, as far as the often imperfect preservation 

 of the shells permits. The six genera from the Ilha'tic Beds are 

 eimilarly treated (pp. 137-13!)). 



Thus all the evidences that the relics of Gasteropods in the 

 British and, in many associated instances, foreign Jurassic strata can 

 yield to the experience of experts, as to zoological and geological 

 conditions and changements, are here brought to our convenient 



