1891.] Recent Literature. 563 
WEED, W. H.—The Cinnabar and Bozeman Coal jase of Montana. Ext. Bull. 
Geol. at Am., Vol, II., pp. 349-364, Pl. 13. From the soci 
WHITEAVES, J. F.—Descriptions of Some New Species of Pons from the Devonian 
Rocks of Manitoba. Trans. Roy>Soc. Can., Vol. VII., Sec. 4, 1890. From the author. 
WHITMAN, E. O.—Specialization and Organization, Companion Principles of all Pro- 
gress, Reprint from Beet Lectures, 1890, From the aut 
WIEDERSHEIM, R.—Beitraige zur Entwicklungsgeschicte von Proteus anguineus. 
Separat-Abdruck aus] dem apc fiir Mikroskop. Anatomie, Band XXXV. From the 
author. 
WILLIAMS, G. H.—The TPED and Structure of the Piedmont Plateau in Mary- 
land. Ext. Bull. Geol. Soc. Am., II,, pp. 301-319. From the society. 
WILLIS, B.—Graphic Field eee n Areal Geology, Bull. Geol. Soc. Am., Vol. IL., 
pp. «cs P1.6. From the author 
WIN , A=—The meant lata eee ome Geology of Western Arkansas. 
Bull. ea. ae Am., Vol. II., pp. 225-242, Pl. 8. m the author. 
WOLFF, J. E.—On the as Cambrian Age 7 x Stockbridge Limestone. Ext. 
Bull. Geol. hooks Am., Vol. ÍI., pp. 331-338. From the society. 
WOODWARD, A. SMITH. —On a Tooth of a Carboniferous Dipnoan Fish : oops 
neno —On Two Groups of Teeth of the Cretaceous Selachian Fish Ptychod 
Reprints from the Annual Report Yorkshire Philos. Soc., 1889. From the author. 
OLTERSTORFF, W.—A/dytes obstetricanus und Triton palmatus im Thüringer Wald. 
Separat-Abdruck aus dem Zoologischer Anzeiger, No. 357, 1891. 
——Ueber die Geographische Verbreitung der Amphibien Deutschlands insbesondere 
Wiirttembergs. oh ctepipsiran te us Tieni des Vereins für vaterl. Naturkunde 
in Wiirtt,’ 1890. From the author 
RECENT LITERATURE. 
The Oyster: A Popular Summary of a Scientific Study,’ 
by Prof. William K. Brooks, of Johns Hopkins University, is a most 
fascinating little volume,—fascinating not only for the way in which 
the story of an oyster’s life is told, but also because it is the first time 
that the real dangers to the great oyster industry of the Chesapeake 
ave been clearly told so that the “ practical man ” may no longer 
have any excuse for ignorance and disregard of them. The remedy 
for the threatening danger of extinction of the oyster in a large pro- 
Portion of the waters of Maryland is pointed out, and it is to be hoped 
that the necessary steps may be taken looking towards rational methods 
of oyster culture and adequate legislation in the state of Maryland. 
The author, after giving an account of the most successful experi- 
ments in rearing spat at home and abroad, gives histories of how our 
* The Oyster: A Popular Summary of a Scientific Study. By W. K. Brooks. Johns 
Hopkins Press, 1891. 
