Reviews and Book Notices. 283 
fauna as the Dibunophyllum zone is entered, and to estimate 
the value of field evidence on which the classification is based. 
This change of fauna occurs in a typical section at the first 
maximum of Productus giganteus, and the following fossils can 
be expected. 
Dibunophyllum, sp. | Productus giganteus. 
Carcinophyllum. | P. hemisphericus. 
Syringopora cf ramulosa. P. corrugato-hemisphericus (Mut D), 
Cyathophyllum murchisont. | Chonetes aff comoides. 
Campophyllum aff murchisont. | Cyrtina septosa. 
This is by no means an exhaustive list, but it includes forms 
which have been obtained at this horizon in the Yoredale 
Province, and it is interesting to note that they can be compared 
with specimens from the same horizon in the Bristol and South 
Wales areas, similiar both in kind and stage of advance. The 
correspondence of the faunal sequence in the Carboniferous 
rocks of our area, so far as they are exposed, with that of 
similiar horizons in the Bristol area is very marked. 
We have received parts I. and II. of ‘The Hastings and East Sussex 
Naturalist,’ the journal of the Hastings and St. Leonard’s Natural 
History Society. It is edited by Mr. W. Ruskin Butterfield. 
The Annual Report and Transactions of the North Staffordshire 
Field Club for 1906-7 contains a portrait and memoir of the late J. Ward, 
F.G.S. Inthe same publication Dr. Wheelton Hind has some interesting 
‘Speculations on the Evolution of the River Trent.’ 
Mendelism. R.C. Punnett. Second edition. Cambridge, Macmillan 
& Bowes, 1907, 85 pp., price 2/- net. In view of the excellent summary of 
the theory of Gregor Mendel, which Dr. Agnes Robertson recently gave in 
these columns (July, pp. 242-246), our readers will be glad to know that in 
the present well printed volume is a very lucid and carefully written account 
of ‘Mendelism.’ At the low figure of two shillings the book deserves a 
large sale. 
Peat: Its use and manufacture, by P. R. Bjérling and F. T. Gissing. 
London, J. Griffin & Co., 1907. 173 pp. 6/- net. 
The volume under notice is the outcome of a suggestion of the late Sir 
Clement Le Neve Foster, who placed a number of valuable notes at the 
authors’ disposal. Its main object is to indicate the most economical 
methods of digging and preparing peat for fuel. By the aid of sixty 
illustrations the various processes of its manfacture are clearly described— 
most of these, as might be expected, being from Swedish sources. The 
book deals with the formation, growth, and distribution of peat ; specific 
gravity and analyses; methods of digging, cutting, and dredging: drying ; 
peat fuel manufacture ; nature and uses of peat as a fuel ; and uses of peat 
otherwise than as fuel. There is a very useful bibliography. In the 
chapter on the distribution of peat, we learn that ‘ A? Holderness, near 
Hull, there is peat, with trees, two feet deep, and at Hornsea, near Hull, 
~beds are seen at low tide which contain peat and black root beds six feet 
deep.’ But, strangely enough, no mention whatever is made of the extensive 
deposits at Goole and Thorne, which are worked so largely ! 
1907 August I. 
