212 TUE WASATCH AND BEIDGER FAUN^. 



Anajitomorphus, represented by a jaw found in the Bridger beds of Wyoming, 

 in wliose dentition Quadrunianous characteristics are so marked as to have 

 induced me to comj)are it with such typical forms as Simia. The characters 

 of the mandibular dentition then recorded are those of the true monkeys, 

 but the permanent separation of the mandibular rami distinguishes the genus 

 from these and from the marmosets, constituting a resemblance to the lemurs. 

 The dental formula is I. 2 ; C. 1 ; P. M. 2 ; M. 3 ; the crowns of the pre- 

 molars with a single, undivided, compressed tubercle. In the following 

 year I published (May 6, 1873) a second paper, in which the characters of 

 Anaptomorphus and of the earlier described TomUherium (Cope) were more 

 fully elaborated. In this essay I refen-ed* the latter genus also to the Quad- 

 rumana, but as expressing a t}'pe even more aberrant than the Lemurs, and 

 therefore well separated from the true monkeys. I cited, as reasons for 

 this reference, the flat ilium, the long femur, the round head of the radius, 

 the form of the distal end of the radius, with the coossified symphysis and 

 four transverse incisors of the lower jaw. I pointed out that the forms 

 of the molars are similar to those of the Quadrumana, and to animals of 

 some other orders as well, while the number of molars is greater than in 

 the Lemurs, or any other known group of the order. The formula of 

 the mandible is I. 2 ; C. 1 ; P. M. 4 ; M. 3. I also pointed out the resem- 

 blance between this genus and Hyopsodus, which was then estimated as 

 Ungulate, but which has since been stated to be Lemurine. Finally, I 

 added to this series, in the same year,t the genus described by Leidy as 

 Nothardus, and a foiirth species, which belongs to tlie genus Pantolestes 

 Cope. 



In the Actes of the Linna'an Society of Bordeau.x fur 1873, J M. Del- 

 fortrie publislied a description of the cranium of a Mammal which he named 

 Palceolemur betiUei, which he referred to the Lemurs, pointing out certain 

 differences. He gave a number of characters which he deemed sufficient 

 reasons for such a course. Chief among these are the completed orbits, 

 directed partially forwards, which are associated with elongate nasal bones, 

 large petrous bone, and acutely tubercular molars. M. Dclfortric also points 



•Oil the Primitive Types of tliu Miitiiiiiiili.a Kdiieiiliilia. 



t Aiiiimil Keport U. S. Gcol. Siirv. Terrs., Itf7-J (pub. 1873), p. 5-19. 



tAiiii. So. GiSol., t. iv,N(). iv, p. 18, pi. vii, viii, 1874,niMl Jounial de Zoologio, iv, p. 4C-I. 



