CRANIA FROM THE MOUNDS OF FLORIDA. 



415 



(Norma lateralis.) 

 Fig. 12.— Absaroka, 1,228. 



The external nose in a skull of a CroAV Indian, No. 1,228, Absaroka, fig. 12, 

 is extraordinarily different from those of the Moore series. The arch of the nasal 

 bones is high and compressed. The ascending process of the maxilla is parallel to 



the inner wall of the orbit. The dis- 

 tal part of the figure of the conjoined 

 nasal bones is convex, in firm contact 

 with the perpendicular plate of the 

 ethmoid bone, which projects beyond 

 the lumen of the anterior nasal aper- 

 ture. The glabella and supra-orbital 

 ridges are as in specimens Nos. 

 1,781, 1,782, 1,784, Moore series. 

 The incisor eminence, the alveolar 

 line, the incisor crest and anterior 

 nasal spine are marked. The skull 

 is platycephalic with moderately 

 psedomorphic occiput and enormous 

 transverse torus. The contrast be- 

 tween No. 1,227 Blackfoot, Kootenay 

 fig. 13, and any of the Moore series is seen in the rudimental glabellar, con- 

 vexity at the nasal salient. The distal end projects beyond the line of the 

 anterior nasal spine, though in less degree than in No. 1,228, Absaroka. The 

 incisor eminence is marked, the 

 alveolar line nil. The incisor crest 

 and spine large. The skull is phox- 

 ocephalic. 



(3). The orbit. The superior 

 margin of the orbit is described 

 as the orbital arch in text books. 

 In truth it is rarely an arch. In 

 this essay it will be assumed that an 

 oblique line is present, which extends 

 from the supra-orbital notch to the 

 end of the external lateral process, 

 and which constitutes the outer part 

 of the orbital arch, and that the 

 curved surface answering to the space 

 from the same notch to the end of 

 the internal angular process is the 



inner part of the orbital arch. The two parts are distinct in range of variation 

 and in morphological significance. The inner part is found in all mammals, while 

 the outer part is confined to the relatively few genera in which the orbit is limited, 



52 JOURN. A. N. S. PHILA., VOL. X. 



(Norma lateralis.) 

 Fig. 13.— Kootenay. 1,227. 



