500 
B iblio graph teal Notices . 
izing the ova of ripe forms captured in the trawl, and returning 
them to the sea, an idea which originated with the Americans in 
regard to the cod. Little training would really be necessary for 
this, since the skippers of trawling-vessels and not a few line- 
fishermen in Scotland readily and successfully carry out artificial 
fertilization. 
The plates attached to the work are eighteen in number, and of 
these twelve are coloured. Certainly no expense has been spared 
in regard to the first nine — the work of an accomplished artist, Miss 
Willis. A smaller number of coloured figures of the common sole 
perhaps might have sufficed. In the structural figures great care 
has been exercised by the author, though the effect after litho- 
graphing is sometimes a little harsh, e . g. in plates x. and xii. 
Some of the figures in the last three plates (done in Jena) are very 
neat, though there are a few small structural omissions, such as the 
absence of the hypural and epiural elements in the transparent tails 
of the young flounders in pi. xvii. fig. 5 and pi. xviii. fig. 1. 
In the preparation of this treatise the author has had to consult 
popular favour and at the same time promote the advancement of 
science. On the whole he has accomplished his task with much 
perseverance and ability ; and though there are omissions of 
moment and a tendency to take somewhat limited views of various 
questions, still the work is creditable and noteworthy both in regard 
to the fisheries and zoology. W. C. M. 
A Zoological Pocket-Book, or Synopsis of Animal Classification . By 
Dr. Emil Selene: a and J. R. Ainsworth Davis. Charles Griffin 
& Co. : London, 1890. 
This is a translation by Mr. Ainsworth Davis of the third edition of 
Dr. Selenka’s 4 Zoological Pocket-Book/ It consists of a series of 
classificatory schedules, comprising definitions of the phyla, classes, 
and orders of the animal kingdom, together with explanatory remarks 
and tables. At the end of the book Mr. Davis has added some 
useful 44 Notes on Distribution/ 7 and also a table showing the 
44 Geological Range of the chief Animal Groups. 77 The book is inter- 
leaved with blank paper for the reception of brief synopses of 
44 voluminous lecture-notes, or, in some cases, definitions of families 
and smaller subdivisions. 77 The size of the book (small octavo) 
renders it an extremely handy little volume, and different-sized type 
is usefully employed in order to emphasize the various classificatory 
divisions. The book is, of course, intended for students, but its 
value will largely depend upon the way in which it is used. Thus, 
for a 44 short-course 77 man, struggling with the anatomy of his half- 
dozen types, schedules such as these would scarcely be necessary, 
and, if used, would probably be productive of much confusion. The 
more advanced student, on the other hand, who has received a good 
general grounding in zoology, will be certain to find this little book 
of much assistance in preparing for examination. In the face of 
