158 NATURAL SCIENCE [September 



system of England. We say intelligent advisedly, because Mr 

 Woods has not included in his lists those scraps of fossils which 

 are considered by some authors worthy to occupy their text and 

 their plates. The mollusca of the Chalk Bock have been described 

 in the Quarterly Journal of the Geological Society, vols. Hi. and liii., 

 and comprise ten cephalopods, sixteen gasteropods, and twenty-nine 

 lamellibranchs, and of these some seven of the first group occur in 

 Saxony and Bohemia, two or three only of the second group, and 

 about one half of the third. Fossils from this zone are rarely 

 obtained in a perfect condition, and are frequently denuded of their 

 shell, but Mr Woods has succeeded in figuring some typical speci- 

 mens which will be useful to the collection. In looking through 

 part ii. of his paper, we do not see any mention of Dover, where the 

 Chalk Eock is easily accessible and fairly rich in fossils ; indeed, in 

 a few hours we have collected all but two of the gasteropods men- 

 tioned by Mr Hill in the Quarterly Journal, vol. xlii. As the ener- 

 getic members of the Geologists' Association were observed in 

 numbers at the Chalk Eock of Dover last Easter, Mr Woods might 

 easily have obtained a list of specimens. It is gratifying to read 

 that the author intends to proceed with the Inocerami, for they are 

 in worse confusion than most other shells. His synonymies of 

 Lima hoperi and Spondylus spinosus are interesting and important. 

 Mr Woods will forgive us perhaps if we point out to him that 

 Salvius did not print the molluscan part of Linne's edition xii. until 

 1767, and therefore the date cannot be 1766 ; but why not use the 

 tenth edition, 1758, now almost universally recognized? 



A list of other remains identified is supplied, and discussions on 

 the distribution and relations of the fauna and conditions under 

 which the Chalk Eock was deposited are given. The whole is a 

 useful and valuable paper which will be largely in request. 



TlERKA DEL FUEGO 



In September last year we were favoured by Dr Ohlin with an 

 account of the zoological results of Baron Oscar Dickson's expedi- 

 tion to Tierra del Fuego. A preliminary notice of the geographical 

 results of that expedition is now published in the Scottish Geo- 

 graphical Magazine for August. The country consists of a wood- 

 less tableland in the north, and a mountainous district in the 

 south, the latter being the extreme continuation of the Cordilleras. 

 The boundary between the two zones is almost a straight line. 

 The northern country is stated to be of Tertiary age, covered partly 

 by gravel and partly by moraine. 



