RESULTS OBTAINED BY OTHERS 421 



the great apes and man, and to this assemblage he gave the name 

 Neopithecini, or modernized Primates. This opinion, therefore, would 

 be highly important if true, for, if confirmed, it would mean that the 

 Adapidse represent an early evolution stage of the group that includes 

 man and the higher apes. 



Stehlin, in 1908, in his monographic revision of the European genus 

 Adapts, which ranges from the Lower to the Upper Eocene of France, 

 concluded from a comparison of the dentitions that the American Nofh- 

 ardus and its allies were not nearly related to Adapis, but that the two 

 formed divergent contemporary families in Europe and America, which 

 Avere not more nearly related to each other than to other families of 

 Primates. Stehlin showed that the x\dapidae in the fundamental archi- 

 tecture of the skull were related to the modern Lemuridw. 



Schlosser, in Zittel's Grundziige der Palaontologie (1911), referred 

 Notharctus and its allies to the Adapidre and suggested that the European 

 genera might l^e derived from the more primitive ISTotharctid genus 

 P el y cod us. 



As long as N othardus and its allies were known chiefly from the denti- 

 tion and scattered limb bones, and as long as the architectural plan of 

 the skull was but i)oorly known, there was room for these wide differences 

 of opinion regarding the relationships of the N'otharctidse and the 

 Adapidae with each other and with the higher Primates. 



OBSERVATIONS OF THE WRITER 



In 190,'^ and subsequent years, however, American IMuseum expeditions 

 under ]Mr. Walter Granger, working in the Middle Eocene formations of 

 Wyoming, discovered a series of specimens which has afforded an ade- 

 quate knowledge of the skull, vertebrge, and limbs of Nothardns. This 

 material was generously placed in my hands by Doctor Matthew, with 

 the consent of Professor Osborn, and it has afforded much new evidence 

 regarding the relationship of the Notharctidje with the Adapida^, with 

 the Lemurs, and w ith other groups. 



I purpose, tlu'i-d'oi'i.', to present very briefly some of the evidence wliich 

 has led me first to adopt the view of Schlosser, tliat the Notharctidge 

 and Adai)i(Ia' aie closely related to each other and to the Lemurs, and, 

 secondly, to inodiry largely the view of Wortniau regarding their several 

 relationships with the Lemurs and willi the highci- Pi-imates. 



'I'he American genera Nothardus and Tclmalesles agree with the 



lMiidj)ean genera Addpis and Lrpfadn/iis. not only in the general form 



of the skull as a whole, but also in the form of the orbit, malar, sagittal 



and lambdoidal crests, lower jaw, and dental formula. Veiy important 



XXXIII — Bull. Geol. Soc. A.m., Vol. 26. 1914 



