No. 445-] OSTKOLOG]- OF PVGOror 



aspect on either side. Aiikmi- these dixc-rs t 

 much ahke. 



It is shaped so as t.. be in hanii..ii\ with tl 



this suitace is cmpleteiy closed in by the r 

 of the vicinity the splenial and denta'ry y 

 As amon- the Alcichr. however, we' find ; 



in the loon in the same situation. Both ti- 

 de veloped. 



Viewed from above, we find the mandih 

 with rather a short symjjhysis. The artici 

 quadrate are large and included in a scjuai is 

 dibular end. Each angle is truncate from 

 and backwards, its emarginated lateral border 

 a rather deep concavity, seen upon direct jxist 

 the outer of these two borders on cither ranv 

 upwards, forwards, and outwards as tjuite a 

 process. Thus I consider the an<;lcs of thi 

 both truncate and recurved, and it is easy t 

 gradual steps this condition in the I'rinatorid; 

 ified as to have the truncation subonhnatcn 

 while the process became the feature of the iv 

 in such a form as Lunda cinata, wherein 

 change is reciuired to j)roduce the im.cess r 

 lina'. The mandible of I .ants ,^lamns bef< 

 process, and the i)arts that give rise to it : 

 mandibular ends being reduced to their sim| 

 articulation with the quadrates. 



The skull and mandible in the L-rinator: 

 matic. though a])i)arently not always so in T. 



I regret very much to tintl that the hyoid , 

 the skeletons 'of these divers in my hands 



