PROSIMIiE. 249 



Anaptomorphus homunculus Cope. 



Paleontological Bulletin, No. 34, p. 152, 1862. Proceed. Amer. Philos. Soc, 1881, p. 154 (1882). 



Plate XXIVe, fig. 1. 



Thi.s species wns founded on a cranium without lowei' jaw. It is dis- 

 torted by pressure, but its form is normally nearly rovmd, when viewed 

 from above or below. The extremity of the muzzle is broken away, but 

 the alveolus of the external incisor indicates that it is short and not pro- 

 longed as in Tarsius spectrum. The mandibular ramus, already described, 

 proves the same thing. The orbits are large, but not so much so as in 

 Tarsius spectrum; their long diameter equals the width of the jaws at the 

 last superior molar teeth inclusive. The supra-orbital borders project a 

 little above the level of the frontal bone, which is concave between their 

 median and anterior parts. The cranium is wide at the postorbital region, 

 in great contrast to its form in the Adapidce, resembling the Necrolemiir 

 antiqmis Filh. in this respect. The postfrontal processes are wide at the 

 basal portion, and flat. From their posterior border the temporal ridges 

 take their origin. These converge posteriorly and probably unite near the 

 lambdoidal suture, but this part of the skull is injured. The anterior lobes 

 of the cerebral hemispheres are indicated externally by a low boss on each 

 frontal bone. 



The paroccipital process is short and wide at the base, and it is directed 

 downwards and forwards. The alisphenoid descends so as to form a strong 

 wall on the anterior external side of the otic bulla. This is also the case 

 in Tarsius spectrum., but in the extinct species the descending ala is more 

 robu.st and has a thickened margin. On the latter the external pterygoid 

 ala rests by smooth contact of its thickened superior edge. The ala is twice 

 as prominent as the internal pterygoid ala. The posterior nareal opening 

 is not Avide, and its antei'ior border is parallel with the posterior border of 

 the last superior molar teeth. The palate is wide, and its dental borders 

 form a regular arcade as in man, being quite different from the form usual 

 in monkeys and lemurs, including Tarsius. Perhaps the form is most like 

 that of Microrluinchus laniger. The proximal parts of the malar bone are 

 prominent, and overhang the maxillary border, as in Tarsius. 



