32 



TIUCIIOLOGIA 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 

 striae Figure 29 b 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, T {^ by ^-| T , gradually tapering to ygV~5 a ^ tne apex; color, rather lighter than 

 that of the head ; lustre, feeble ; button, sometimes sub-oval, and at others double cone- 

 shaped ; length, T ^ ; diameter, 5 | 7 , that of the shaft, at the junction, being -^fa, 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 lanugo 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 tho^e of the beard. 



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, -%fa ; smallest, T | T 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, investing 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; " #," the button; "b," 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, ly^- of an inch; diameter, T ^ y to %$$. 



With 220 grains one inch stretched -^ of an inch, elasticity minus -^ 



" 570 " 



" 670 " 



" 720 " 



" 770 " 



" 820 " 



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