362 Morton’s Crania Americana. 
MEASUREMENTS.* 
Longitudinal diameter, . . . . 7.3 inches. 
Parietal do. ote “aerate Chee 
Frontal do. lodeten of 4 tee OO. 
Vertical Bigatti is ice: AS..ido. 
Inter-mastoid arch, ee: tects’: 24: | ow 
Inter-mastoid line, 7 ee ee ee ae 
pat 
ot 
Qu 
2 
Occipito-frontal arch, - 
Horizontal pexialiess #15 4 -AR8--do. 
Extreme length of head and fac, 8.2 do. 
Internal capacity, 81.5 cubic inches. 
Capacity of the anterior aroker, 31.5 do. 
Capacity of the posteriorchamber, 50. do. 
Capacity of the coronal ae 16 25 do. 
eects angle, <1. 5 =. - » #38 degrees.” 
This skull was found by ‘Dr. Ruschenberger, about a mile 
from the town of Arica, on the south side of the morro, a ceme- 
tery of the ancient Peruvians. “The surface is covered with 
saud an inch or two deep, which being removed discovers a stra- 
tum-of salt, three or foar inches in thickness, that spreads all 
over the hill. The body (to which this-head belonged) was 
placed in a squatting posture, with the knees drawn up and the 
hands apylied to the sides. The whole was enveloped in a 
coarse, but close fabric, with stripes of red, which has withstood, 
* Th th ibed Morton. The longitudinal diam- 
eter is taken from the most pr rominent part oie os frontis to the occiput; the 
parietal diameter from the most distant points of the parietal bones; the frontal 
diameter from the anterior inferior angles of the parietal bones ; the vertical diame- 
ter from the fossa, bctween the condyles of the occipital bone, to the tup of the 
skull ; the inter-mastoid arch is measured with a graduated png from the point of 
one mastoid process to the oth er, over the external tables of the skull ; the imter- 
mastoid line is the distance, in a straight line, between the points of the mastoid 
processes; the occipito-frontal arch is measured by a tape dver the surface of the 
cranium, from the posterior margin of the foramen magnum to the suture, which 
connects the os frontis with the bones of the nose; the horizontal periphery is 
measured by passing a tape around the cranium so as to touch the os frontis imme- 
lately above the superciliary ridges, and the most prominent part of the occipital 
bone; the length of the head and fuce is measured from the margin of the upper 
jaw, to the most distant point of the occiput; the zygomatic diameter is the dis- 
Spuekeadbons ts invented by Dr. Turnpenny, — described by = Morton. Dr. Mor- 
ton took nearly all the anatomical measure nts with his ow 
