HRDLICKA ] PHYSICAL ANTHROPOLOGY OF THE LENAPE 37 
is a single instance, and in only one case are there two canals of 
medium size. The exact significance of this showing is not clearly 
understood. When present these canals transrait, as is well known, 
a small arteriole and an emissary vein which connects the venous 
systems within and without the wall of the skull. 
XVII. MUNSEE CRANTA: PARIETAL FORAMINA 
9 males 12 females 
| Cases Per cent | Cases Per cent 
INOS ee ARES On eI Op ose oa) SUS So Sep eos He SEe HO Rares Rarners 3 33 6 50 
Mam Siniibeis fae ca eee ee eR ae Pose ean ew: | 3 33 1 8 
(VGA GIT 22 * Bes ee. caters ood ees cous see essa sos pee ee oes | 2 22 4 33 
Secale pee oo eer ene) Sear ee ee ht | 1 HT ch eee eee 
HeiodinmMmyOn LiehG eoeMUNN LS ONMOLb «2 os on, he eamteet oe oes cute aiall eS rcfae s Slee cee Sse 1 8 
RETROMASTOID FORAMINA 
The retromastoid (“mastoid’’) foramina are most often two in 
number—a larger and a smaller—one of which transmits a vein 
from the transverse sinus within to the cutaneous occipital vein on 
the outside of the skull wall, and the other a smaller branch of the 
occipital artery. Like the parietal foramina, they show considerable 
individual and groupal variation in both number and size. It is not 
uncommon in some Indian crania to find one of these canals to be 
of very appreciable diameter (up to 4 mm.), While in the Munsee 
skulls they appear almost generally two on each side, they are in no 
instance above moderate size, and in several cases are quite minute. 
Thus in these specimens the retromastoid foramina stand in har- 
monious rather than compensatory relation with the small or even 
absent parietal foramina. 
XVIII. MUNSEE CRANTIA: RETROMASTOID FORAMINA 
-: cn 
8 males 12 females 
Cases Per cent | - Cases Per cent 
BaMmoderate Size CACHISIGG..sa4ec2 sao seenee es ~ shea Seiten ose 7 88 5 42 
PASTA GOTT, CACMSICG)22 eke aaa gona See = <n eee see oe 1 12 4 33 
iemroderalesize tCAChiSiGe@. cn... tease a=. once cieece se sae. 2 5se|esece ees | Ba seces 1 8 
J rSiabvOpMiniwle, CACHISIGO. sot. o2 022 kee cecece ccc cs ece ciccee 1 12 4 33 
2, medium; right side; 2small, left side... ......21.2.2.002.222.]22. REP y See ee ot: 1 8 
MASTOIDS 
The mastoid processes are mainly of importance as sexual charac- 
teristics. Their value in this respect, however, differs considerably 
