220 REPORT ON АМ ADDITIONAL COLLECTION OF SKELETAL 
are of type 4, which distinctly shows four instead of three surfaces, the additional 
plane resulting from a duplication of the posterior surface by a ridge which follows 
the line of the septum between the flexor longus digitorum and the tibialis posticus 
muscles. 
TIBIA—SHAPE OF SHAFT AT MIDDLE 
ARKANSAS LOUISIANA 
Types of Shape M 
Males | Females Males | Females 
| | | | 
Right Lett | Right Left 
| | | | 
| | | | 
| | nae 
Right, Left | Right | Left 
Number of specimens | 
examined [o orn ER | 
| 
x 
| 
x 
7 6 20 22 a) 3 
Types: 1 ог near 1 (а)! 2 | 4 | К ' 5 9 | 5 4 
2 от пеаг 2 1 | 1 | 2 | 2 | жи. | 1 3 
3 or near 3 3 3 | -- x -- 6 | 4 | 2 | 1 
4ornear4 | 7 | 4 | — | — 5 | ера um. 
5 or near 5 | 1 -- | = | -- -- | -- | 2 | 1 
6 ог пеаг 6 | — 1 (6) | - | — | — | = | — | = 
(а) і Ordinary prismatic. 
2 Lateral prismatic. 
3 External surface markedly concave. 
4 Posterior surface divided into two distinct surfaces by a vertical ridge. 
5 Posterior surface concave, external border indistinct. 
: 6 m eR prismatic, with postero-lateral and antero-lateral surfaces markedly convex and anterior bor- 
er very dull. 
i P Specimen 255.1384 was partly fused with tibia, which may account for this exceptional shape in an 
ndian. 
The inclination of the head of the tibia was, in no case, very pronounced. 
The Fibula. 
The proportion of fibule available for measurement is rather small, though 
fragments are numerous. Тһе measurements of length show practically equal aver- 
ages for the bones of the two sides. 
The shape approaches most frequently the ordinary or the lateral prismatic. 
In female skeleton 255.097, Louisiana, both the fibule are unusually flat. 
The Clavicle. 
The collection contains 31 clavicles that can be measured. These bones show 
nearly the same dimensions in the two areas from which the material was gathered. 
They also show that the left clavicle is on the average somewhat longer than the 
right. A similar condition exists, as we know from the studies of Pasteau! and 
others, in whites and in other races. 
' Pasteau, Е. Recherches sur les proportions de la clavicule dans les sexes et dans les races. 
Thése. Paris, 1879. 
