REMAINS, FROM ARKANSAS AND LOUISIANA. 195 
show, as do the average measurements, considerable likeness to those of the three 
other series of skulls available for comparison. The higher indices in the female 
than in the male crania of the Louisiana group are apparently exceptional. The 
locality differences, shown in the following table, are so irregular that no definite 
significance can be attached to them. 
PALATE: COMPARISON OF AVERAGE MEASUREMENTS AND INDICES 
қ Number External length of | Greatest external 
Sex and Locality of the palate (Turner), ‘breadth of the HN 
specimens averages palate, averages © 
— n TK | жесе -—- 
_ || — ——— — 
Males 
Louisiana 10 5.75 (5.4-6.1) | 6.65 (6.2-7.3) | 216 (108.3-122.2) 
Arkansas: Boytt's Field 12 5.57 (5,3-6,0) | 6.56 (6,1-7.1) | 118 (108,6-126.8) 
Arkansas: Menard and Greer cemeteries 1 S шын AU | Шы; 
Arkansas: Drew and Mississippi counties 7 5.75 (5.6-5.8) |7.02 (055-740) 22 (113.0-128.6) 
Females 
Louisiana 5.35 (4.9-5.6) | 6.50 (6,0-6,8) | 722 (111.1-127.4) 
Arkansas : Boytt's Field 
Arkansas: Menard and Greer cemeteries 5.71 (5.35-6.2) | 6,80 (6.55-7.1) | 779 (114.5-127.1) 
5,44 (5.1-5.7) 16.37 (5.95-6.75)| 117 (104.4-133.9) 
nan © 
s 
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Arkansas: Drew and Mississippi counties 
Additional Measurements ој the Facial and Other Parts of the Skull. 
The individual data are here given, as in the case of the Arkansas crania, in a 
separate table, in order to facilitate their possible use according to secondary locali- 
ties or other standards. Thus presented they will also render easier the study of 
the effects of deformation on some of the measurements, particularly the diameter 
frontal maximum (see page 194). 
Prognathism.—For the Louisiana series of skulls the measurements pertain- 
ing to facial and alveolar prognathism give an average basi-facial angle in each sex 
of 70°, with an average alveolar angle of 55.5° in the males and 52° in the females. 
The alveolar process in the females is somewhat more slanting, but it either does 
not increase or it increases but little the total facial protrusion. As will be seen in 
the next table the measurements and angles relative to this feature show a close 
similarity to those obtained on the Arkansas series, particularly the skulls from 
Boytt’s Field. The basi-facial angle presents remarkably small variation, both 
within the individual series and in the separate groups. 
The Frontal Bone.—Asin some of the Arkansas specimens, the smallest frontal 
breadth is decidedly low in some of the Louisiana skulls, and it never exceeds 
moderate dimensions. 
The averages given below show, as usual, a perceptibly larger diameter frontal 
minimum in the males than in the females; and there is a close similarity in the 
measurement of the Louisiana series and the crania from Boytt's Field, Arkansas. 
25 JOURN. A. N. 8. PHILA., VOL. XIV. 
