152 Scientific Intelligence. 
sects may be considered as composed of but four segments. This 
memoir is illustrated by two plates and several wood-cuts. __ V- 
15. Seaside Studies in Natural History ; by Exzzazetu ©. A 
assiz and ALEXA Agassiz. Second edition, 1871. (James R. 
of the subject. , moreover, the only popular work 
many of the most interesting marine animals of our shores afe 
described and It is, therefore, gratifying to s at 
work has been so we 
In this edition but few changes have been introduced. These are 
names have been added. , 
16. Keport on the Brachiopoda obtained by the U. 8, Coast 
Survey Hep of L. F. De Pourtales, with a Re 
vision of the Craniide and Discinide ; by W. H. Datt.—Bulle- 
tin of the Museum of Comparative Zoology, Vol. iii, No. 1, Cam 
paper. v. 
1%. Arrangement of the Families of Mollusks ; e THEODORE 
Gitt. Smithsonian Miscellaneous Collections, February, 187 1,—In 
? * 
view of the wide diversity of opinion among zodlogists concerning 
t t an 
scheme that can be proposed at present will be generally adop 
Yet we are constantly approximating to a true natural classifica- 
_ gations that have recently been undertaken. The author of the 
