142 



DR. C. I. FORSYTH MAJOR OF THE 



[Feb. 19, 



Microcehus. 



Three species have been examined, viz., if. smithi, M. minor, and 

 M. coquereli — The fossa lacrymalis is on the facial portion ; in 

 all the species its anterior border is formed by the maxillary (text- 

 figs. 44 & 45). The loAver orbital margin is foi-med by the crista 

 posterior of the lacrymal, with which the malar bone laterally 

 articulates - 



Text-fig. 44. 



Text-fig. 45. 



Text-fig. 46. 



Text-fig. 44. Orbital region of Microcehus smithi (Br. M. No. 37.9.26.78), about 



4 uat. size. 

 Text-fig. 45. The same of Microcelms smithi (Br. M. No. 35.12.26.281), about # 



nat. size. 

 Text-fig. 46. The same of Callithrix personata (Br. M. No. 45.4.2.11), about 



nat. size. 



(Lettering as in text-fig. 26.) 



M. smithi. — Out of twelve specimens examined, in six the 

 lacrymal expands medially on the face, so as to reach the nasal, 

 and form a sometimes rather elongate lacrymo-nasal suture (text- 

 figs. 44 & 45). In the other six cases the frontal and maxillary 

 separate the two bones mentioned before, so that we have a fronto- 

 maxillary suture, which is always very short and in some cases 

 nothing more than a mere touching of the two bones. 



M. minor. — In the three specimens examined, a lacrymo-nasal 

 suture is brought about by both the bones sending a process to 

 meet one another ; in one of the specimens, on one side a very 

 thin process of the frontal joins the maxillary, so as to separate 

 the nasal from the lacrymal. 



Ojpolemur (text-fig. 37). 



The anterior margin of the facial fossa lacr. is formed by the 

 maxillary. The lacrymal does not reach the nasal, a broad 

 junction of the frontal and maxillary taking place between the 

 form.er two bones. The malar reaches the lacrymal ; the lacrymo- 

 malar suture is inside the orbit and continued on the orbital 

 margin. The orbital portion of the lacrymal is broad, without, 

 however, extending far into the orbit ; behind it is limited by the 

 frontal (medially) and the maxillary (lateraUy), no separate os 

 planum being present. 



