32 Reviews—Dr. Marsson’s Chalk Bryozoa of Rugen. 
clays with thin sandstones, septarian nodules, selenite, and pyrites ; 
(3) the “roach,” a ferruginous marl with oolitic grains. The 
clays and the nodules near their base give fossils of an “ eminently 
Neocomian” character. The sands representing the ‘“ Carstone,” or 
Upper Neocomian of the district (pp. 28-27), have few fossils, but 
many phosphatic nodules. 
The Upper Cretaceous of Lincolnshire (pp. 28-70) consists of the 
Lower Chalk and the Middle Chalk; and this begins with (1) the 
Red Chalk (overlying the Carstone Sands); and this is succeeded 
by (2) the ‘ Inoceramus-beds,” (3) the “zone of Holaster sub- 
globosus,” and (4) a ‘“shaly marl.” Next above comes (5) “hard 
rocky chalk,” making the base of the Middle Chalk, followed by 
(6) ‘*Chalk with flints and Inoceramus Brongniarti.” In Cambridge- 
shire the equivalents of these divisions are—for part of 1, 2, and 
part of 8, the ‘*Chalk-marl,” or “zone of Rhynchonella Martini” ; 
for part of 3, the ‘‘ Totternhoe Stone”’; for the rest of 8 and 4, a 
similar zone and shaly marl; for 5, the “Melbourn Rock” and the 
“gone of Rhynchonella Cuvieri” ; for 6, the “zone of Terebratulina 
gracilis,” which is succeeded by the “zone of “olaster planus,” and 
then by the ‘ Chalk-rock,” neither of which members of the Middle 
Chalk appear in Lincolnshire (p. 80 and footnote). The relative 
value of ‘these divisions is discussed; the details of their thick- 
nesses, characteristics, and chemical constitution, and paleontology 
are carefully explained, as well as their sections, exposures, and 
surface-features. Six woodcuts and several tables illustrate this 
chapter; and the fossils are tabulated and noted at pp. 142-147. 
The Glacial Deposits (pp. 71-101, with woodcut sections, figs. 11 
to 19) are described in detail as the “Older” and the ‘“ Newer 
Boulder-clay ;” and the Post-glacial Deposits (pp. 102-112), as (1) 
the “ Revesby Gravel’’; (2) the. Marsh and Fen Deposits ; and (3) 
Blown sand. All of much interest, both locally and generally. 
Chapter IX. (pp. 118-131), treating of the hills and valleys of 
the Wolds, is an explanation of the physical features of Hast 
iLéngollneti, worked out con amore, carefully written, and well 
illustrated with plans and sections. Amateurs as well as specialists 
must derive a real scientific pleasure in following Nature’s pro- 
gressive handiwork in rendering this part of the Hast of England 
what it now is. 
The Economics and Water-supply are very well calculated to serve 
the country. A useful Index and good plate of sections complete 
this valuable Memoir. 
II.— Die BryozoEN DER WEISSEN SCHREIBKREIDE DER InseL RUGEN 
von TH. Marsson. Mit 10 T'afeln. Band 4, Heft 1, 1887. 4to. 
pp. 1-112. Palxontol. Abhandl. herausgegeben von Dames 
und Kayser. 
O Dr. Marsson of Greifswald paleontologists are already 
indebted for two beautifully illustrated memoirs on the 
Foraminifera,’ Cirripedia and Ostracoda of the White or Upper 
1 Mittheil. des naturwiss. Ver. fiir Neuvorpommern u. Riigen in Greifswald, 
Zehnter Jahrgang, 1878, pp. 115-196, Tat. i.-y. 
