Robert Bennett Bean 397 
weight of 75 kilo (165 pounds). ‘Two are noted as “ brunette.” One 
is a dark Scandinavian. No records are made of the intellectual condi- 
tion, or anything that would give a clue to it. 
Type III is a composite of seven cases. The cross section of the corpus 
callosum is long, narrow, and highly arched. The splenium is large, the 
isthmus and body small, and the genu large with a long beak. The 
brains of this type are small (1200 to 1350 grams), high, long (dolicho- 
cephalic), and oval in shape from the side and from above. The ventricles 
are large and full of fluid. The bodies from which the brains are ob- 
tained are emaciated, the majority weighing little more than 45 kilo. 
(100 pounds), death being the result of lingering disease (senility, 
asthenia, etc.). The men were old (60 to 80 years), with an average 
height of 168 cm. (5 feet 6 inches). There was evidence of dementia in 
two or three. 
Type IV is a composite of six cases. The cross section of the corpus 
callosum is short, of medium size, and not large anteriorly. The splenium 
is large, the isthmus is large, the body and genu are relatively small. 
The brains of this type are of medium size (1200 to 1500 grams), high, 
short, narrow, and boxlike in appearance, with full frontal and temporo- 
parietal regions. The men were of average height, 165 em. (5 feet 5 
inches), of ages ranging from 15 to 75 years, and in weight varying from 
50 to 80 kilo. (111 to 178 pounds). Two were Germans from Berlin. 
Type V is a composite of four cases. The cross section of the corpus 
callosum is long, and the arch is high and more curved than in any other 
type. The splenium is large, the isthmus thin, the body of medium size 
and the genau not large, but having a long pointed beak. The brains vary 
in weight from 1040 to 1520 grams. They are high, long and rounded 
in all outlines. The ventricles are large and distended as if by pressure 
from within. The bodies were in a fair state of nourishment. The men 
were old (60 to 75 years), and ranged in height from 157 to 186 cm. 
(5 feet 2 inches to 6 feet 1 inch). 
Caucasian female types——In general the female types are similar to 
the male types of the same number. So few cases are given that general- 
ization is inadmissible. 
Composite Caucasian types—The composite types are composites of 
all the Caucasian male types and of all the Caucasian female types. The 
most noticeable features of the corpus callosum of the Caucasian in com- 
parison with that of the Negro are the high arch, and the greater size of 
the anterior half of the corpus callosum in the Caucasian. The splenium 
is of good size in the Caucasian, but not so large as in the Negro, while 
the isthmus, body, and genu are larger than the same parts in the Negro. 
