1876.) Recent Laterature. 739 
valleys that run in the direction of the dip; anaclinal, valleys that run 
against the dip of- the beds. Of the second order there are anticlinal 
| valleys (Figure 66), which follow anticlinal axes; synelinal valleys 
2 (Figure 67), which follow synclinal axes ; and monoclinaf valleys, which 
en the direction of the strike between the axes of the fold — one 
: side of the valley formed of the summits of the beds, the other composed 
of the cut edges of the formation. This classification rests solely, the 
oN adds, on typical examples, one form often running into another. 
n ne who is quite ignorant of geology will find the report exceedingly 
| eresting, while the professional geologist, in whose hands the volume 
has now been for over a year, has doubtless profited by its perusal. 
3 Davies PREPARATION AND MOUNTING OF MICROSCOPIC OBJECTS. 
po ‘se compact manual of the art of preparing and mounting 
oily the és : sui we always supposed that the present one was prob- 
S A st. he second edition is a still more useful book, and has 
en specially adapted by the editor for the use of medical students and 
young practitioners. For general use, however, we can recommend it 
as a cheap and reliable book. 
a — ARD Martin's Brotoey.” — A notice, by; a most compe: 
Apri a - the first edition of this excellent manual appeared in the 
K.. mber of the NATURALIST. This second edition 1s issued at a 
price, and contains a number of corrections and alterations, the 
Pages having been entirely reset. 
oo ANUAL OF THE VERTEBRATES 
is. TATES. — To those desirous of a cheap m 
, ; ation of our land and fresh-water vertebrates, 
— EW recommend this book as well compiled and convenient, while. 
price makes it generally accessible. The characters of the classes 
OF THE NORTHERN 
anual for the ready 
we should unhesi- 
and orders are much abbreviated, and the generic char 
only such points have been gen- 
The classifica- 
t innovations 
aa . while for specific characters, e 
poaa as are distinctive as well as descriptive. 
oa i a on that of recent authors, and no importan 
I ave been suggested by the author. : $ 
pooier to test the part related to reptiles and batrachians we’ have 
- ponlified several species, before unknown to us, with ease and cer- 
~ Hy. The objection to such books as this is that the brief and con- 
Q den sed descriptions are apt to be unsatisfactory in critical cases, but as 
it 
ond a P reparation and Mounting of Microscopic Objects. By Tuomas Davies. Sec- 
Pat on greatly enlarged. Edited by J. MATHEWS, M.D. New York: G. P., 
i ons. 18 
Sse 
. mo, pp. 214. $1.25. i 
ae se of Practical PPAR Ae in Elementary Biology. By er pA ae 
Macmil] To. N ARTIN. d E vised. London an ew ; 
sM, an & Co. 1876. $2.00. : i oe 
pe of the Vertebrates of the Northern United States. Including the District 
the Mississippi River, and north of North Carolina and Tennessee, exclusive 
Tine Species. By Davip STARR JORDAN, © S. M. D. Chicago: Jansen, 
»& Co. 1876. 12mo, pp. 342. . 
east, 
