Hected papers upon all classes of invertebrates that only éareful 
5 ae 
Geology and Natural History. 81 
as odie porch potassium iodide, ete. It is onclude that 
in which some ninety minerals are arranged according to their 
behavior with citric acid, with and without the addition of other 
reagents. The memoir gives proof of much patient labor, and 
the field is one in lees little had been done previously.—A nnals 
we Y. Acad. Sci., ii, No. I. 
8. Proceedings af the Academy of Natural Sciences of Phila- 
delphia.—For the convenience of those interested in Mineralogy 
and Geology, the papers of the Figen of this pepo ple in 
bee sa 
pices of the Zoolopiaal Station at Naples. As Dr. Dohrn informs 
Us In the introduction, there are no less than twenty monographs 
W in preparation, all based upon the rich materials - be found 
in Bis Bay of Naples. e subjects of these mono 
been so far circumscribed that Dr. Dohrn ipa little as little to 
Succeed in accomplishing the task of “sweeping before his own 
door,” and giving us a complete Sd of the Fauna and Flora 
of the Gulf. If the succeeding monographs can be maintained to 
the high standard set for them by the first of these publications, 
they will form a series of faunistic biological monographs with- 
out a parallel, and present a model which few biologists can hope 
to excel. Dr. Dohrn has here shown far better than by any ver- 
bose report, the value to rye of pepe like the Zoological 
and anatomical Fousuale have been so flooded ak discon- 
faunal monographic biological studies connecting the chaos of 
independent observations into a homoger sal whole, will aag us 
which every worker has now to make his way. Biologists can- 
hot be too grateful to Dr. Gorn for his patience in waiting until 
he could ye sa a monograph comprehensive enough to cover 
a 
al u. Flora des Golfes von ie Rail rausgegeben von der Zoologischen 
31 ton a ne Nea eapel. I Monographie, Cienophora, ve “i Carl can Ato, pp. xviii, 
mit 18 Tafeln u. 22 Holzschnitten. Leipzig, (Wilhelm Engelmann.) 
Am. Jour. Sct. ee SERIES, Vor. XXI, No. pes a. 1881. 
