374 Reviews—Desor’s Index. 
VI.—Invex to Dxsor’s Synopsis pes Ecurnipres Fossites. By F, A. 
Batuer, M.A., D.Sc., F.R.S. Avec une note sur les dates de 
publication du Synopsis par Jules Lambert. Published by the 
Author, Fabo, Marryat Road, Wimbledon, England, May, 1910. 
Price to subscribers, 7s. 
HIS Index, to the preparation of which the Grorocicat Macazine 
drew attention some time ago, has now been published and 
should prove of great use to every worker on Echinoids, whether fossil 
or recent, and to those who, without claiming to be specialists, 
frequently have occasion to look up a name. Reference is made 
particularly easy by the fact that the Index is arranged in two parts, 
the first under the names of species in alphabetical order, the second 
under the names of the genera, the name of each genus being followed 
by a list of the specific names that are in any portion of the book 
associated withit. The value of such an Index will be more apparent 
when it is remembered that the Synopsis was issued in parts and that 
several of the pages were cancelled, additions being made later on. 
Also there were several series of Addenda, and various names occur 
either in the plates, or in the tables, or in foot-notes, to which reference 
is by no means easy; in fact, many of them almost entirely escape 
observation. 
Systematists have long been puzzled by the fact that this original 
Synopsis was issued in separate parts, and that owing to the destruction 
of the original wrappers they were quite unable to determine the 
dates of the various names that, occur in it. This task has now been 
accomplished for them by Mr. Jules Lambert, who, together with the 
late P. de Loriol, spent many years in trying to obtain the necessary 
details. The whole of the results are summarized in a collation of 
a supposed biblographically complete copy. 
Dr. Bather deserves the gratitude of his fellow-workers for under- 
taking this laborious task, and we may express a hope that their 
gratitude will be shown by a speedy sale of the work. 
VII.—Brier Notices. 
1. Haneine Vatieys.—In the Bulletin of the American Geographical 
Society (1909) Professor D. W. Johnson deals with two questions 
involved in the problem of glacial erosion: (1) Are hanging tributary 
valleys a reliable indication of glacial erosion of the main valley? 
(2) May not hanging tributary valleys result from glacial widening 
of the main valley, instead of from glacial deepening? In the paper 
the author discusses the origin of hanging valleys, and deals with 
a number of glaciated valleys in Europe. 
2. Tur Rexation of Grotocy to TopocrapHy.—Professors D. W. 
Johnson & F. E. Matthes contribute a chapter with this heading to 
Breed & Hosmer’s Principles and Practice of Surveying (New York). 
After pointing out the value of a knowledge of geology to the 
topographer, as giving him ‘“‘some understanding of the conditions 
under which the surface was formed”, the writers point out by a 
series of diagrams the differences between accurately and inaccurately 
mapped mountain areas. They show also how correct contouring of 
eS a 
