QUARTERLY CHRONICLE. 159 
borate memoir by M. P. Bert, part of which appears in this 
number of the ‘ Annales.’ A number of experiments—over 
one hundred in all-—are detailed, in which the tissues of one 
animal were transplanted to another, two plates accompany- 
ing the paper giving microscopical sections of the united parts. 
The experiments were made chiefly by means of rats, the tails 
being removed and transplanted. The object was to observe 
the nature of the tissue produced, and the effect on the trans- 
planted tissue. In many cases absorption of the bone took 
place, and great vascularity was induced. The conditions of 
relative age and health seem to have a modifying influence 
on the result of the transplantation. A curious experiment 
is suggested by the author, which, however, he has not tried— 
it is, to cut off the tail of a fully mature rat, and to trans- 
plant it beneath the skin of a rat much younger. When this 
one begins to get old the grafted tail is to be extracted, and 
introduced beneath the skin of an animal in full vigour of 
development; and so on. It is obvious that, if this process 
is carried on, the tail will live much longer than the animal 
from which it was detached, and perhaps for an indefinite 
time. Some interesting conclusions may be drawn from such 
an experiment as this. 
“ Some Crustacea from the Coast of Brittany’ is the title 
of a paper by M. Hesse in the same journal, in which he de- 
scribes species of the genera Slobberina, Cirolane, and a new 
genus, Eucolombar. 
Journal de l’Anatomie, &c. (Robins). May and June.—This 
number contains a very interesting paper by Dr. Marey, the 
inventor of the sphygmograph, “ On the Nature of Muscular 
Contraction,’ which is, however, unfortunately, not a micro- 
scopical one. It also contains the continuation of M. Polail- 
lon’s paper on “ Peripheral Nervous Ganglia.” 
MM. Ranoier and Cornil contribute a paper “ On the His- 
tological Development of Epithelial Tumours (Cancroid),” 
which will be found very valuable by those interested in pa- 
thological microscopy. 
“<< Researches on the Structure of the Brain of Fishes, and 
on the homological signification of their different parts,” by 
M. Hollard, is a good paper, illustrated by three plates. He 
describes a typical form of encephalon in each of the large 
groups of fishes, and in all these carefully points out the ho- 
mologies with the parts of the human brain. 
ENGL AND.—Annals of Natural History. June.—* On the 
Anatomy and Physiology of the Vorticellidan Parasite (Tri- 
chodina pediculus, Ehy.) of Hydra,’ by Prof. H. James 
Clark.—This paper was read before the Boston Society of 
