668 General Notes. J uly, 
a 
which is surrounded by as many zonary placentæ as there are 
fœtuses, the placentæ not, however, forming perfect zones. He 
finds the ungual phalanges at this period to differ entirely from 
that of the adult. Instead of being long and claw-shaped, they 
are wide and _ hoof-shaped, with a trilobate margin, as in the ex- 
tinct genus Gyptodon. This is highly interesting as exhibiting 
the law of acceleration modifying that of heredity. The sexual 
characters are probably like those of the hyznas, in that the 
female foetus has a clitoris so large as to give her a close resem- 
blance to the male—Z. D. Cope. ; 
PSYCHOLOGY. 
GAMBETTA’S Brain—The Revue recently (November 21st, 
1885) gave the weight of Gambetta’s brain, according to M. A. 
Bloch. This weight, which was remarkably light (1160 grammes), 
evidently ought to be considered as an entirely secondary element 
in a proper estimate of the diverse qualities of the organ. At a 
recent session of the Society of Anthropology (March 18) Pro- 
fessor Mathias Duval communicated a very interesting report M 
which he brought out and gave their due value to certain struc 
tural details of this brain—to certain characteristic elements which 
must be regarded as far outweighing the simple consideration of 
the gross weight of the organ. Compared with the brains of in- 
dividuals known to have been possessed of but little intelligence, 
and representing types of reduction of the third frontal convolu- 
3 tion, the brain of Gambetta, besides other peculiarities, shows a 
type of extreme development of that convolution. This devel 
a opment is such that not only are the secondary convolutions more 
~- numerous and more complicated than those of ordinary brains, 
But, besides this, the “ cape” is double. BS 
~ This development is evidently in favor of the localization as 
covered by Broca, who held that the third frontal convolution he , 
the seat of speech: M. Mathias Duval has also pointed out as 
two following peculiarities, the significance of which he has m i 
n able to determine. : and 
(1) The right quadrilateral lobule is very complicated, “tal 
_ is divided into two parts by a sulcus which starts from the E 
fissure. The lower of these two parts is subdivided into pri 
= secondary convolutions by the presence of a'lfissure with num 
_ ous branches arranged in star-like patterns. : : 
= (2) The occipital lobe is notably reduced, especially be 
pear to him scientific—in the sense that it preserves, €s regu- 
he frontal region, in spite of the complication of its folds, = April 
arity which may be called schematic. —Revue Scientifique, °° 
d, 1886, p. 444. : : 
