1898] SOME NEW BOOKS 279 
founded is 2902, coming from 1940 different places, and in no previous 
ease have the observations been so detailed and interesting. 
Among the facts and conclusions of scientific importance which 
Dr Davison claims to have established with regard to the Hereford 
earthquake the following may be mentioned:—The position of the 
centres of disturbance is determined, and also the direction and hade 
of the originating fault. It is shown that there were two entirely dis- 
tinct centres, lying in a north-west and south-east line, and separated 
by a few miles, the north-west centre being the first in action by a 
few seconds. A series of new lines called ‘ isacoustic lines’ (or lines 
of equal sound-audibility), is drawn; these throw an important leht 
on the origin of the earthquake. Coseismal lines (or lines passing 
through places where the shock was felt at the same instant) are 
drawn for the first time with an approach to accuracy, and by their 
means the average velocity of the earth-wave (which, in the case of 
any but avery strong shock, was unknown) is determined. While the 
estimates of the direction of the movement in a limited area vary 
widely among themselves, it is nevertheless found that the average of 
all these directions passes through the centre. 
We hope that the publication of so interesting a work will not be 
prevented by any backwardness on the part of British geologists. 
SCRAPS FROM SERIALS 
In the Transactions of the Manchester Microscopical Society, there 
is a paper on Botriomyces a microcosm which produces tumour of the 
jaw in oxen chiefly, and was formerly regarded as a malignant cancer 
known as osteo-sarcoma. This is by Mr Worstenholme. Mr 
Gillanders reviews the Hemiptera-Homoptera, and Mr Mark Sykes 
treats of Natural Selection in the Lepidoptera. This latter paper, 
which we hope to notice elsewhere, is beautifully illustrated by eight 
plates. 
_ The Proceedings of the Royal Society of Victoria (vol. x. pt. 2) 
contains papers by W. 8S. Dun on some new Upper Silurian Corals ; 
J. Dennant on a new Unio from the River Glenelg (U. glenelgensis ; 
a much wrinkled form resembling young examples of U. australis ) ; 
E. R. Waite on Muridae from Central Australia with two new generic 
names founded on species of Gould’s (Podanomalus and Thylacomys) ; 
J. Dennant and Clark on the Miocene of the Gippsland Lakes area ; 
Pritchard and Gatcliff on Coralliophila wilsoni, a new gasteropod from 
Port Philip; Baldwin Spencer on Initiation Ceremonies in the Arunta 
Tribe; T. 8. Hall, Stylasteridae from the Victoria Tertiaries with a new 
genus " Deontopora ; Officer and Hogg the second part of the Geology 
of Coimaidai ; and Ada M. Lambert on a new land Leech (Philaemon 
pungens ; Blanchard, undescribed), 
In the Journal of Conchology for July there is an interesting 
account of the pairing of Zimaxz maximus, L., by Mr Lionel E. Adams, 
fully illustrated by Dr J. W. Taylor. Observations were made on the 
whole performance and much information concerning the curious 
suspensory threads was obtained; the anatomy of the parts is also 
given by Mr W. M. Webb. 
