REVIEWS 123 
author has found in these (white glacier clay and other fresh water 
clays) a much smaller number of foraminifera, some of which are cer- 
tain to belong to the underlying older formations of the Tertiary and 
Quaternary ages. ‘This is just the reverse of what is the case in the 
marine deposits, in which foraminifera are abundant and in which 
specimens belonging to the older formations are exceedingly rare. 
These minute animal remains, therefore, give important evidence 
as to (1) the physical condition under which deposits are made, whether 
in the open sea, fiords, or in lakes; (2) the climatic conditions, and 
(sometimes) (3) the geological age. 
An appendix contains an annotated catalogue of the 86 species of 
the foraminifera found inthe marine diluvium of Denmark; a map 
indicates the localities where the samples of the drift examined have 
been taken, and a plate illustrates several species, one of which is new. 
The paper is evidently prepared with care and after a thorough 
study of the previous work of other geologists in the same field, and 
after critical observations on many localities by the author himself. 
A cautious conservatism pervades the statement of facts and argu- 
ments. While expressing his belief that the drift in Denmark can best 
be explained as the result of three separate glacial periods, Mr. Madsen © 
seems to take particular care not to overrate the significance of such 
observations as support this theory, and to treat this as a question still 
in need of a positive answer from that country. 
J. A. UDDEN. 
Om Lommaterans alder. By N. O. Horst and Jon. Cur. Mosere 
(Sveriges geologiska undersékning, Afhandlingar och upp- 
satser, No. 149). 
One of the localities in southern Sweden regarded as furnishing 
evidence for an interglacial period is near Lomma station on the coast 
of Ore sound. Excavations have here been made into a cla 7, which 
furnishes material for the manufacture of brick and cement. The 
deposit is about twelve feet in thickness, it is bedded and lies at a level 
of about 45 feet above the sea and about 28 feet above the highest 
postglacial beaches in the vicinity. The authors have lately studied 
the locality critically, and maintain that the Lomma clay is a marine 
glacial deposit, and not interglacial, as De Geer contends. 
The evidence presented in support of their views is, in the first 
