182 Notes and Comments. 



ACLISINA. 



At a recent meeting of the Geological Society of London, 

 Mrs. Longstaff read a paper on Aclisina and Aclisoides, with 

 descriptions of six new species. The diagnoses of these were 

 given, and a species named by Mr. H. Bolton Loxonema 

 ashtonensis is referred to this genus, as several specimens 

 show the characteristic lines of growth. The total number, of 

 species of Aclisina is now brought up to twenty-two, and there 

 are besides several varieties. A small variety of Aclisina 

 pulchra De Koninck appears to have continued for the greatest 

 length of time, commencing in the Calciferous Sandstone Series, 

 existing throughout the Lower and Upper Limestone Series 

 and on into the Millstone Grit of Scotland. Additional ob- 

 servations are also made on Aclisoides striatula De Koninck, 

 showing its variation in size and ornamentation, as well as its 

 range throughout the Lower and Upper Carboniferous Series 

 of Scotland, its occurrence at Settle and Poolvash, and at 

 Tournai as well as Vise. 



MICROSCOPIC MATERIAL OF THE BUNTER. 



At the same meeting, Mr. T. H. Burton read a paper on 

 ' The Microscopic Material of the Bunter Pebble-Beds of 

 Nottinghamshire and its Probable Source of Origin.' As 

 shown by the distribution of the heavy minerals, combined 

 with (a) the direction of the dip in the cross-bedding, (b) the 

 evidence adduced by boreholes and shaft-sinkings, a main 

 current from the west is indicated. In the neighbourhood of 

 Gorsethorpe this current bifurcated, one division flowing east- 

 wards, the other running south-eastwards. A large quantity 

 of the material is derived from metamorphic areas, as shown 

 by the presence of staurolite, shimmer-aggregates, microcline, 

 sillimanite, and kyanite. The source of the bulk of the material 

 is probably Scotland, and the westward adjoining the vanished 

 land, from rocks similar in the main to those of the metamorphic 

 and Torridonian areas known in that country. Minor supplies 

 came from the neighbouring Pennine ridge, and from other 

 surrounding tracts of high land. The material was transmitted 

 by means of a north-western river and its tributaries, flowing 

 into the Northern Bunter Basin. During certain flood periods 

 this river overflowed across Derbyshire, carrying its load of 

 sediment, much of which was deposited, as it is now found, 

 in the Pebble-Beds of Nottinghamshire. 



A NEW RUSSIAN MAGAZINE. 



As we have recently recorded the decease of a number of 

 British scientific journals, it is with some satisfaction to record 

 a new Russian scientific journal, the Revue Zoologique Russe, 

 edited by A. N. Sewertzoff and W. S. Elpatiewsky, the English 

 agents for which are Messrs. Witherby & Co. The articles 



Naturalist 



