1902.] 



Osborn, American Eocene Primates. 



201 



its principal characters. In reference to Forsyth-Major's 

 (1901) very precise examination of the lachrymal in the Lem- 

 uroidea and Anthropoidea it is important to note that this 

 bone in Anaptomorphus resembles that in the Lemurs, espe- 

 cially such a form as Opolemur (op. cit., p. 139, text fig. 37), 

 much more closely than it does the lachrymal of Adapts or 

 of any of the Anthropoidea, in the following respects: (i) 

 the pars facialis is broader than the pars orhitalis; (2) the 

 lachrymal fossa is extra-orbital, being bounded posteriorly by 

 the crista posterior lacrymalis which forms the anterior rim of 

 the orbit. In the words of Forsyth-Major: "In Lemurs, as 

 a rule the crista lacrymalis posterior rides on the lower orbital 

 margin, of which therefore it forms a portion . . the 



anterior part of the lachrymal thus becoming the pars facialis, 

 the posterior part the pars orhitalis ... As a result, we 

 have the lachrymal fossa outside the orbit. . . . " {op. cit. 

 p. 134). Anaptomorphus re- 

 sembles Chrysothrix in the re- 

 duplication of the infra-orbital 

 foramen. 



This sustains Cope's state- 

 ment (1884, p. 250) and 

 definitely proves that in the 

 structure of its lachrymal 

 Anaptomorphus is lermiroid.; it 

 does not, however, prove posi- 

 tively that it is a Lemur. 



The transversely extended 

 form of the upper molars and 

 premolars is correlated with 

 the brachycephaly of the skull ; 

 the molar pattern being best 

 indicated in Fig. 25. Observe 

 especially the depression and 

 transversely oval form of the 

 superior teeth, the relatively 

 broad short crowns of the inferior teeth, the trigonid and 

 talonid being of approximately the same width. 



Fig. 25. Anaptomorjihus homunciilus. 

 Am. Mus. No. 41. This specimen has un- 

 fortunately been misplaced. 



