1893.] Recent Literature. 243 
RECENT LITERATURE. 
Memoirs of the National Academy of Sciences, Vol. V.— 
The memoirs of 1891, five in number, are published in the usual 
quarto form under the following titles: Energy and Vision, by S. P. 
Langley ; Contributions to Meteorology, by Elias Loomis; Report of 
Studies of Atmospheric Electricity, by T. C. Mendenhall ; The Embry- 
ology and Metamorphosis of the Macroura, by W. K. Brooks and F. 
H. Herrick ; On the Application of Interference Methods to Astro- 
nomical Measurements, by A. A. Nicholson. The illustrations are 
numerous and good. 
Brooks and Bruce on the Embryology of the Macroura.! 
—The two hundred and fifty quarto pages of this memoir are not 
easily summarized in a page or so of THE Natura.ist, for they 
include a wide range of subjects. After an introduction by Professor 
Brooks comes an account of the life-history of Stenopus hispidus by 
Professor Herrick ; next the habits and metamorphosis of Gonodacty- . 
lus chiragra by Professor Brooks ; fourth the Metamorphosis of Alpheus 
sauleyi by Brook [sic] und Herrick, while the bulk of the volume is 
taken up by Dr. Herrick’s paper: Alpheus, a study in the development 
of the Crustacea, which extends from page 371 to the end. ; 
The most interesting facts connected with the reproduction of the 
almost cosmopolitan Stenopus are the hatching of the larva as a pro- 
tozoxa with enormous mandibles and its later metamorphosis into a 
larva with an enormously developed fifth pereiopod, the use of which 
as a swimming organ has doubtless played an important part in the 
wide distribution of the species. 
Much more important are the observations on Gonodactylus, for 
every fact concerning the early embryology of the Stomatopods is a 
positive addition to knowledge. Gonodactylus, like the others of its 
tribe, deposits its eggs at the bottom of its burrows, where they are 
aérated by the currents produced by the pleopoda of the parents. 
From these eggs the young hatches in an advanced condition, five 
abdominal segments with their appendages being outlined before the 
young escapes from the chorion. Professor Brooks was enabled by this 
material to conclusively show that the larval Stomatopod to which he 
The Embryology and Metamorphosis of the Macroura, by W. K. Brooks 
and F. H. Herrick. Memoirs Nat. Acad. Sci., Vol. v, pp- 321-576, 57 pls. 
Washington, 1892. 
