32 TRICHOLOGIA MAMMALIUM; 
junction of the arm with the shoulder, is covered with hair, contains much cellular mem- 
brane, lymphatic ganglions, important vessels and nerves, and numerous sebaceous follicles, 
furnishing an odorous secretion. ‘The button of this hair often draws out with its follicle. 
Figure 29 a is one of these, upon which may be seen the button, sub-oval shaped, the 
follicle, with parts of two disrupted vessels ; also a portion of the shaft, with its transverse 
strie. Figure 29 d represents a section of the skin of a male of 25, and the hair -set 
therein. ; 
These hairs are, in general, in length from one inch to an inch and a half; shape, oval; 
diameter, 74, by 544, gradually tapering to ;,4, at the apex; color, rather lighter than 
that of the head; lustre, feeble ; button, sometimes sub-oval, and at others double cone- 
shaped ; length, ;4,; diameter, 54,, that of the shaft, at the junction, being ;1,, others 
club-shaped; sheath small, white, opaque; intermediate fibres, white; centre, white, 
interrupted ; apices, pointed; none furcated. Disks show a minute central spot. 
8. The Hair of the Pubes, or Hypogastric Hair, and its Button.—Called “ pubes,” 
because this part of the hypogastric region is, in both sexes, at the time of puberty, 
covered with pile. In some books this pile is called “ Pubes lanigo Pudendorum,” and 
in others the word pubes is used to denote the parts, and the hair that grows thereabouts. 
These hairs belong to the same category as those of the deard. 
Examination and Description of these Hairs, from the body of a Male, oval-haired 
person of sixty years of age—Length, about three inches; shape, eccentrically 
elliptical ; greatest diameter, 51,; smallest, ;1, of an inch; crisped; color, brown, 
translucent; button, spindle-shaped, or tubular, and pointed at the inferior extremity, or 
rounded. It has sometimes vessels. Sheath, white, opaque, imvesting the button; 
occasionally two sheaths adhering, sometimes there is a neck between the button and the 
shaft; cortex, transversely striated; centre, white, interrupted ; apex, striated and dotted, 
rounded ; disk, with a central oval spot. 
Hypogastric pile is generally of a lighter shade of color than the hair of the head of the 
individual. 
Figure 30 represents one of these hairs with its button and follicle, and a large portion 
of the neighboring tissue; “a,” the button; “d,” a part of the follicle; ‘‘c,” the shaft; 
“d,” the tissue disrupted and torn out of the soft sebaceous skin. 
Remarkable Case—Observing, in a recent number of a Medical Journal, a report of 
Robert King Stone, M. D., of Washington City, of a lad only eight years of age having 
hypogastric hair, I wrote for a specimen, and the Doctor kindly sent me a lock, accom- 
panied by one of the boy’s head. They are dark colored, while that of his head is light; 
length, 154; of an inch; diameter, 51, to 521 
87 2610/0) 
With 220 grains one inch stretched 2, of an inch, elasticity minus 55 
co 570 oe 66 ay “ce ce ce go 
73 a) 73 4 ‘ 6“ ce Be 
ee a 90 90 
3 AD) ce 3 5 3 cc a3 oe 
720 90 90 
“6 770 6c 66 a0 ee e “6 a0 
oe RV) ee ee ngs oe oe oe 4 
