60 TRICIIOLOGIA MAMMALIUM; 



used since the Spanish Conquest, previously to which (according to Herrera) it was kept 

 sacred for the nobles and other dignitaries of Peru. Specimen presented by Prof. S. 

 Pancoast, M. D., of Philadelphia. 



General Appearance. Of the scalp, that of old tanned sheep-skin. The hair has a 

 dead, dry appearance. Length, (natural,) about 2 inches; shape, cylindrical; diameter, 

 ^isr f an i ncn ; color, dark brown; no lustre; direction, straight; inclination, at an acute 

 angle with the epidermis; ductility, with 470 grains one inch stretched -fa of an inch; 

 elasticity, entire; tenacity, broke with 520 grains; fracture, the fibres drawn out of the 

 cortex; button, when free, spindle-shaped, and split at the posterior extremity; sheath, 

 none; follicle, none; the posterior termination of the hair in the scalp, club-shaped and 

 black; length, ^{^ ; diameter, | ; while the diameter of the shaft is -gfa of an inch; 

 shaft, brown color; no lustre; coloring matter, apparently in the cortex, in lines; inter- 

 mediate fibres, white; diameter of one, y^Va" f an i ncn ; apex, mostly pointed; some few 

 abrupt; no furcations; disk, of one uniform color. 



No. 2. Examination and Description of hair and a small portion of scalp from a slaill 

 from Pachacamack, Peru, South America. Specimen presented by Prof. S. G. Morton, 

 M. D., of Philadelphia, being taken from a skull in the Academy of Natural Science, of 

 Philadelphia. 



General Appearance. Of the scalp, of a light brown tanned sheep-skin ; that of the 

 hair, of dry, dead hair; length, (artificial,) eight inches; shape, cylindrical; diameter, 

 SYS- of an inch; color, dark brown; no lustre; direction, straight and lank; inclination, 

 at an acute angle with the epidermis ; ductility, with 170 grains one inch stretched J T of 

 an inch, and with 320 grains -fa ; elasticity, entire ; tenacity, broke with 720 grains ; 

 fracture, the cortex disrupted, and the fibres drawn out; button, spindle-shaped, dark 

 colored, particularly at the posterior extremity ; length, T |-g ; diameter, ^^ ; the diameter 

 of the shaft being ^^ of an inch ; sheath, none ; follicle, none. 



Of Hairs imbedded in the partly decayed Scalp. The posterior portion of a grown hair 

 is spindle-shaped, with a ragged lower outline, below which is a mass of coloring matter, 

 and under that again three or more vessels. The spindle is, in length, T -J^, and diameter, 

 T {^ ; that of the shaft being u |^ of an inch. The mass of coloring matter is of the length 

 of 2-^-g-, and of the diameter of T {^ of an inch. The vessels have a diameter of ^-sVjr of 

 an inch. Alongside of this grown hair is a young one, which is now set in the dermis at 

 its posterior extremity, and free at its anterior one ; but which has, between these two 

 extremities, adhering to it, three separate pieces of decayed scalp, making it probable that, 

 at the lime of the death of this person, this hair had not pierced the epidermis. It has a 

 diameter of only -j^V^ of an inch, is spindle-shaped at its posterior extremity, and is devoid 

 of biitton, sheath and follicle, the coloring matter being smaller in quantity, but located 

 like that of the grown hair. Throughout the whole portion of scalp are spots of coloring 

 matter, some of them too small for exact measurement. 



Shaft cortex, transversely striated, the scales easily removed by rolling the hair 

 between two pieces of glass ; intermediate fibres, white, easily separated by crushing a 

 hair; coloring matter in the cortex; apex, abrupt and pointed; disk, having a minute 

 white central spot. 



