NOTES AND COMMENTS. 



DERBYSHIRE ROCKS. 

 Mr. Jonathan Barnes, F.G. S., the President of the Man- 

 chester Geolof^ical Society, has contributed some interesting" 

 notes to the 'Transactions' of his Society, rehitive to the rocks 

 of Derbyshire. The first, ' On a Metamorphosed Limestone at 

 Peak Forest,' describes the changes in the Carboniferous 

 Limestone due to the contact of an ig-neous rock. These are 

 admirably shown in the accompanying- illustration, for which 

 we are indebted to the Council of the Manchester Society. 

 Fig". I is ,1 -^ei-tion of the unaltered limestone, with remains of 



Encrinites, Polyzoa, and Foraminifera. Fig-. 2 is the same rock 

 after contact with the dyke, when it exhibits a saccharoidal 

 structure resembling- statuary marble. Both examples are 

 magnified fifteen diameters. In his ' Further Observations on 

 the Chang-es brought about by the Intrusion of Igneous Matter 

 into the Carboniferous Limestone of Peak Forest,' published in 

 a later part of the 'Transactions,' Mr. Barnes describes and 

 figures some beautiful small quartz crystals occurring in the 

 limestone. 



LIVERPOOL BIOLOGISTS. 

 If the health and vigour of a society can be measured by the 

 bulk of its Transactions the Liverpool Biological Society must 

 be in an enviable position. The volume recording the ' Proceed- 

 ings and Transactions' of the past session (Vol. XVI., Session 



1903 Marcli 2. g 



