118 ON THE UAKAKI MONKEYS. 



Fig. a 



The same parts in an Old-world Monkey (Cercopithecus pyrrhonotus), showing the 

 parietal and malar separated from each other by the intervention of the frontal 

 (Fr), alisphenoid (Al\ and squamosal (Sq), which are shaded obliquely. 



of five skulls of the first genus in the Royal College of Surgeons Mu- 

 seum, in one the sutures are invisible on account of age, whilst in the 

 P. Z. S. 1880, remaining four the union takes place in one only on both sides, and not 

 p. 540. a j. a jj ' n fa Q remaui i n g three. In the same collection, a single skull of 

 an Aides (471 7 a) also shows no trace of this union. 



In all the remaining genera, so far as I have yet seen, the rule holds 

 good. I was first struck with the arrangement here described when ex- 

 amining the collection of Monkeys' skulls in the Cambridge Museum ; 

 and finding that there was no exception whatever, either there or in the 

 skulls belonging to the Prosector's department, I examined the entire 

 collection of unmounted skulls in the College of Surgeons Museum (in- 

 cluding nearly every known genus of Monkey), with the results already 

 mentioned. The character is at all events worth knowing for practical 

 purposes, even if of no greater scientific value. This, of course, must be 

 left open for more extensive examination *. 



The brain of Brachyurus rubicundus is represented in the accompanying 

 figures (figs. 7-10, pp. 120, 121), which give views of its superior, in- 



* P.8. Jan. 27, 1881. My views have been both confirmed and anticipated by 

 Dr. Gustav Joseph, in a paper in the first volume of the ' Morphologisches Jahrbuch ' 

 (i. pp. 453-65, Taf. xv.). Whilst my paper was going through the press, Prof. Flower 

 was kind enough to call my attention to this paper, as well as to another by the same 

 author in the ' Bericht der Schlesischen Gesellschaft ' which, as yet, I have not been 

 able to see both being referred to in a recently published ethnological paper (in 

 Eussian) by Demetrius Arnoutchine, which also, apparently, contains some more 

 information on the same subject. 



