BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 26, pp. 419-446 November 24, i9i5 



PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



I. ON THE RELATIONSHIP OF THE EOCENE LEMUR 



NOTHARCTUS TO THE ADAPID^ AND TO 



OTHER PRIMATES 1 



11. ON THE CLASSIFICATION AND PPIYLOGENY OF THE 



LEMUROIDEA 



BY WILLIAM K. GREGORY 



{Presented before tlie Faleontological Society December 31, WIJ/., and, 



in abstract, August Jf, 1915) 



CONTENTS 



Page 

 I. On the relation.'^liii) of the Koceiie lemur Xothantu-s to the Atiapiilie 



and to other I'rimate.s 419 



Results obtained by other investigators 419 



Observations of tlie writer 421 



Conclusions 425 



II. On the classification and pliyloseny of the Lemuroidea 426 



On the basicranial region of the Lemuroidea 426 



A classification of the Lemuroidea 432 



Phylogenetic summai'y 4.39 



Bibliography 443 



I. 0\ TIIK l(i:i,.\TI()XSIlIl' OK TIIK EoCENE LeMUR Notharcfus TO THE 

 AdAI'ID.K AM) TO OTHER PrIMATKS " 



RE8VLr,S OBTAINED liV OTHER INVEffTIGATORS 



'V\w gcinis Xollnirchis was rouiidiMl by Leidy in ISlO upon a small 

 fossil jaw which liad hccn foiiiid in the Eocene fni-niation near Fort 

 Bi'id,<rcr. Wyotiiiiiii-. Leidy was iiol ahlc to refer the animal to any 

 e.vistiiiii- (ii'dci' of inaiimials. II( ii(itc(l iis resemblances to carnivorous 

 niainnials on the diic hand and lo ccitain supposed Eocene pachyderms 



III) the dthcl". 



> Manuscript received l).v tlie Secretary of tlie (ieoloRicai Society August 10. 101."). 

 '-'I'lils pai)cr and llio following one contain an oiillim" of oliservations and conclusions 

 whlcli will bp fully presented in a Memoir of the American Museum of Natural Ilistor.v. 



(419) 



