138 NATURAL SCIENCE [August 
under which they were first recorded, but there is an index of specific 
names at the end which renders it easy to find those which have been 
subsequently placed in other genera. It is not always easy to dis- 
tinguish with certainty between type-specimens and those which have 
subsequently been figured; and it was hardly to be expected that 
any distinction should be drawn between holotypes, cotypes, para- 
types, and the like, useful though such distinction is to the systema- 
tist.. We cannot help thinking that where a heading is repeated, it 
is a help to the eye to substitute a dash for the word rather than to 
reprint it each time. There is an error (probably merely clerical) in 
the account of Goniatites iris on p. 57. 
EXAMINATION ZOOLOGY 
Trext-Booxk or ZooLocy. By H. G. Wells, B.Se., Lond., and A. M. Davies, B.Sc., Lond. 
University Tutorial Series. 8vo, pp. 366. London: W. B. Clive, 1898. Price, 
6s. 6d. 
THIS is a new edition of the text-book prepared some years ago by Mr 
Wells for the University Correspondence College Press. The original 
book had many serious disadvantages; the present volume, all of 
which save one chapter, has been re-written by Mr Davies, is im- 
mensely improved. The descriptions are lucid and correct, and the 
diagrams very useful. We have gone over the volume with close 
attention, and with no particular favour for the Correspondence College 
system, but we have confidence in saying that a student who has not 
the opportunity of attending a regular course of zoology, will gain clear 
and correct conceptions from this text-book. It will be necessary, 
of course, for him to go through a considerable practical training in 
addition, and the authors of the volume constantly impress this upon 
his notice. 
THE MetTrRICG SYSTEM 
Now that the metric system of weights and measures is legalised in 
the United Kingdom, everything that tends to encourage its use is to 
be welcomed. The Pharmaceutical Journal has done good service in 
publishing tables of the metric equivalents of various imperial weights 
and measures, together with thermometric equivalents in degrees 
Centigrade, Fahrenheit, and Réaumur. These have now been re- 
printed as a quarto pamphlet, printed on one side of the paper 
only, and to be obtained at the Pharmaceutical Journal office, 5 
Serle Street, Lincoln’s Inn, W.C., price 1s. Ed. nett. 
ZOOLOGY IN JAPAN 
All visitors to Japan know the Japanese Cicadidae. There are 
at least sixteen species found in Japan, of which nine are peculiar 
to that country. A systematic summary of these species, with the 
description of a new one, has been published by Mr M. Matsumura 
in Annotationes Zoologicae Japonenses (vol. i, pp. 1-20, pl. 1). In 
the same number, Mr A. lizuka describes a new species of littoral 
Oligochaete, under the name Pontodrilus matsushimensis, since it was 
discovered in Matsushima Bay, burrowing in the sand under the half- 
decayed leaves of Zostera marina. The species does not agree with 
Mr Beddard’s definition of the genus, in that the vas deferens opens 
