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PROFESSOR D. J. CUNNINGHAM ON 



other. There are certain ape crania in which the arcus superciliaris is absent, and in every 

 large collection of human crania a few specimens will be found in which the same deficiency- 

 may be observed. In the latter the glabella and the region above the orbital opening 

 are flat and vertical, and similar in appearance to what is seen in the forehead of the 

 European child before the superciliary ridges and the frontal air sinuses are developed. 

 This form of supraorbital region would seem to occur most frequently in certain 

 African races. The only skull in the University collection in which there is absolutely 

 no trace of a superciliary eminence or of a glabellar fulness is that of a male Nupe from 



Fig. 5. — Frontal region of a Kham warrior from Thibet (Museum, No. xxiv. A. 2). 

 b. Superciliary eminence. d. Trigonum supraorbital. 



Nigeria which I received from my friend and former pupil, Dr Howard Ensor. There 

 are several specimens (e.g. an Andaman skull, the skull of an adult Negress, a West 

 African skull presented to me by my colleague Professor H. Littlejohn, the skull 

 of a Ba-Mbala native given to me by Mr E. E. Torday, etc., etc.) which at first 

 sight appear to be devoid of glabellar and superciliary eminences ; but when these 

 specimens are inspected in a proper light it is noticed that there is a general 

 fulness in this region, and perhaps a scarcely perceptible indication of the arcus 

 superciliaris. In all there is an appreciable flattening in the region of the trigonum 

 supraorbitale. 



