228 NATURAL SCIENCE [October 



in practically the same way as the former, with the addition of a 

 bibliography, and deals with that important series of shells obtained 

 by the late John Brown of Stanway at Copford, as well as series 

 from many other deposits. The mere mention of Grays, Ilford, and 

 Clacton, as some of these other deposits, will show at once the special 

 interest of the paper to London geologists and conchologists. 



Among the more interesting notes given to us is the confirmation 

 of the rarity of Helix hortensis in a fossil state ; the absence of H. 

 pomatia ; the occurrence of II. aspera in the Lea Valley ; the 

 elimination of Eulota fruticum from the recorded fauna of Copford ; 

 the restriction of the distribution of Pomatias elegans ; and the 

 observation as to the increased size of Hdicclla caperata since 

 Pleistocene times. 



We have now a great advance in our knowledge of the geo- 

 logical history of the non-marine mollusca of our home district ; 

 and though some of the names in Messrs Kennard and Woodward's 

 list may be a little startling to the uninitiated, we are glad to see a 

 possible termination of the confused nomenclature which has 

 prevailed for so many years. 



Triassic Cephalopoda 



The description of Triassic Cephalopods occupies an important part 

 of the recently-issued volume of the Denkschr. d. h. Akarl. Wissensch., 

 Wien. Franz v. Hauer, who has been contributing to the literature 

 of Triassic Cephalopods for more than thirty years, and although 

 now considerably past his threescore years and ten, furnishes a 

 paper on the Trias Cephalopods of Bosnia. This author has already 

 described Triassic Cephalopods from this region, but he now records 

 from a new locality both Nautiloids and Ammonoids, among the 

 latter being the new genus Bosnites. Dr E. von Mojsisovics, so 

 well known for his work on the Trias Cephalopods, contributes a 

 very important paper on the Upper Triassic Cephalopod-fauna of 

 the Himalaya. It is based not only upon the older collections 

 made by Strachey, Stoliczka, and Griesbach, but also upon the rich 

 collection obtained by Messrs Griesbach, Middlemiss, and Dr Diener 

 during their expedition into the Central Himalaya in the year 

 1892. As was to be expected, many new species are described and 

 not a few new genera are proposed. The author points out that 

 there is a marked contrast between the Upper Triassic fauna of the 

 Indian province and the homotaxial fauna of the Mediterranean 

 province, but he believes there was a sea connection between the 

 two regions during Upper Triassic times, and is of opinion that an 

 examination of the intervening districts will probably render the 

 provincial character of these two regions less apparent. 



