108 Recent Literature. [ February, 
Barnacles first appeared in the upper Silurian age. At the 
present day they are found in every sea, and the various species are 
widely distributed. Some are attached to piles and rocks ; Acasta 
is found in sponges, Lepas fascicularis forms of its cement a 
float by which it is supported, Coronula is found in the skin of 
whales; Anelasma squalicola, as its name indicates, inhabits the 
skin of sharks; Chelonobia is found on the backs of turtles in the 
tropical seas. There is an interesting specimen in the Museum 
of the Peabody Academy of Science at Salem, Mass., of Con- 
choderma aurita which had attached itself to a Lernean Crusta- 
cean (Penella), which in turn was parasitic upon the large sun- 
fish ( Orthagoriscus mola). 
The anatomy of the Cirripeds has been worked out by Bur- 
meister, St. Ange, and Darwin. The figure of the nervous 
system given by St. Ange is wonderfully imperfect. It has, 
however, been copied by Coldstream in Todd’s Cyclopzdia of 
Anatomy, in Owen’s Lectures on Invertebrate Anatomy, and 
Carus Icones Zoötomie. Their embryology has been studied by 
Thompson, Burmeister, Darwin, and Fritz Miiller, while a sys- 
tematic account of the subclass is given by Darwin in two volumes 
published by the Ray Society, to which the reader is referred for 
further particulars concerning this interesting group. 
RECENT LITERATURE. 
Tue ZoéLocy or WHEELERS Survey.' — Since the spring of 1871, 
Lieutenant Wheeler has been conducting an examination of the biology 
of the Western Territories, which his parties have traversed, in connection 
with his geographical and geological explorations. No connected re- 
ports upon the facts and material obtained by the survey have ever 
been published, however, and our knowledge of them has been limited, 
with one or two exceptions, to brief accounts of discoveries read to sci- 
entific societies. The publication of this splendid volume of zodlogical 
results is therefore an event in the history of this survey, — one which is 
calculated to increase its friends, —and a monument to the perseverance 
and skillful zeal of the field naturalists. 
The report contains over one thousand quarto pages, and is made in 
the name of Dr. H. C. Yarrow, who, until recently, was naturalist-in- 
charge of the survey; but he acknowledges assistance in the prepara- 
1 Reports upon the Zoblogical Collections obtained from Portions of Nevada, Utah, 
California, Colorado, New Mexico, and Arizona, during the Years 1871-74. Explora- 
tions and Surveys west of the One Hundredth Meridian. Lieut. Geo. M. Wheeler in 
charge. Volume V. Washington. 1875. 4to, pp. 1020 
