434 THE AMERICAN NATURALIST. [Vor. XXXIV. 
examination of the brain of an adult male Eskimo, a member of the 
party of six brought to New York in 1896 by Lieutenant Peary. In 
size and complexity of conformation the cerebrum indicated a degree 
of development equal to that of the average white person. The parts 
of the encephalon did not have the relative proportions that exist in 
the white brain. The frontal lobes were about equal in size to 
those of whites, while the portions posterior to the fissure of Rolando 
were considerably larger. The paper is illustrated by seven excel- 
lent plates. 
In a reprint from the Archives of Neurology and Psychopathology, 
Vol. I, No. 4, 1898, we find a discussion by Dr. Hrdlicka of the 
* Dimensions of the Normal Pituitary Fossa, or Sella Turcica, in the 
White and Negro Races, an anatomical study of fifty-seven normal 
skulls of white and sixteen normal skulls of colored individuals.” 
Since marked enlargements of the pituitary body are of a pathogenic 
nature, it is considered desirable to determine the normal dimensions 
and the range of variation in its size. This can best be accom- 
plished by measuring the pituitary fossa. The length, width, and 
depth of the fossa were measured, and a module derived similar 
to the skull module of Schmidt. The relation to the total size of 
the skull was obtained by multiplying this module by 1000 and 
dividing the result by the circumference of the skull, expressed in 
centimeters. F OR. 
GENERAL BIOLOGY. 
Protoplasmic Streamings. — Martin Heidenhain! adds some very 
interesting observations to our knowledge of the remarkable phe- 
nomena of currents seen in so many vegetable cells. In the elon- 
gated cells of the hairs in the flowers of the pumpkin he studied 
especially the movements of the granules. In favorable specimens 
there are apparent gliding movements of the granules, even when 
the protoplasm seems quiet. Frequently, however, the protoplasm 
is actively moving in masses, producing those constant changes in 
the form and arrangement of the strands that join the central, 
nucleated region with the protoplasm lining the cell wall, that have 
been described by other observers. But even when there is, appar- 
ently, eee rest of the protoplasm, the granules may move 
1 Einiges über die sogenannten Protoplasma-Strómungen, Sitz.-Ber. Phys-Med. 
Gesell. omen 1898. 
