
546 REVIEWS. 
cide are not mentioned by the author) ; d, the Perlarie ; e, the Ephemeride, 
and f,the Libellulide. Three groups remain, **which do not fit well into 
h 
simply degraded Lygæid Paari ERS b, the Thysanura abia are un- 
reason are the Arthrogastra (Scorpio, Chelifer, Pian P and 
Galeodes) placed above the Spiders (Araneina), when —— they are 
so obviously inferior to the latter, as the embryology of the two groups 
(of which not a word is said) decides with so much certain s 
We imagine the author treats that strange form, Sagitta, much as 
Thrips Sag the Case-flies are disposed of, because it does not *'fit well R 
into s her order or class, not agreeing, forsooth, with the ordinary 
nuia " of such order or class (these * definitions " are the bane of 
zoólogy studied as a science.) It is, indeed, thrown into a separate class, 
pepodous crus 
allied to Penella, as Prof. Agassiz has suggested) or the Annelida, where 
the weight of authority perhaps locates 
This book, so interesting and Wesen yet so unsatisfactory, marks 
a transitional era in zoólogy. Many of the author's views had bee n pub- 
lished long before the appearance of the present manual, but the volume 
as been received with such an unquestioning spirit by certain English 
reviews, that we must enter our protest cat many of the pup 
opinions regarding classification; and if the Cuvierian “branches” 
be demolished, do let us have a seat pene Ra Re v 
instead of a c sinibud mass of classes and orders, and almost entire dis- 
belief in the existence of archetypal forms, and ideas in creation—for - 
such surely is the tendency of the book. — To be concluded. 
GUIDE TO THE STUDY Or IxskECrS. * — This work, which has been over a 
year in going through the press, appearing in numbers, has at length been 
completed and issued from the Naturalist’s Book Agency. It comprises 
700 octavo pages, with 651 wood-cuts, and eleven plates, illustrating in all 
g ing dassiction xem ted ea — states in the preface : 
d rp P thor in 
.— 3963, and th ud 
voccm EO on page 104, To the first and highest may be ponies "Leachte 
PPE ese HLA NS See and BS PSE ag nd 

P P + 


/.. * A Guide to the Study of Insects. By A.S. Packard, Jr. M. D. 8vo, pp. 700. 1809. Natural- 


1 
1 
a 
1 
1 
: 

