22 MR. F. E. BEDDARD OX THE [Jail. 17, 



The free iil:),s of the ];i.st dorso-lambar were, hoAvever, present only 

 upon one side. Four ribs reach the sternum on each side, of 

 which the last pair are attached to the xiphisternum. The sternur)i 

 shows the unusual character of being not fenestrated. 



Between the first and second of the caudal vertehroi begin the 

 intercentra. The first, however, are two small nodules only. The 

 chevrons do not commence until the next vertebra. Towai'ds the 

 end of the series the chevrons are occasionally replaced by small 

 nodules. 



As regards the shoulder-girdle^ I have only to remai-k that the 

 clavicle arises from a point a little way down the scapula. 

 . These facts may be supplemented by a comparison of them with 

 the corresponding facts in the osteology of Physignathus lesueuri, 

 a genus not investigated by Siebenrock in his extensive svirvey of 

 the osteology of the Agamid?e. 



The presacral vertebrpe are 24. Of caudal vertebrpe I counted 

 53, and am convinced that not more than one or two are missing. 



The true cervical vertebrte are four instead of five, in which 

 Physignathus agrees with two individuals out of three of Amphi- 

 holurus harhatus which I examined from this point of view. In 

 the third specimen there was at least one rib on vertebra 4. 



The spines of the dorsal vertebrae are much longer in Phy- 

 signathus than in Chlainydosauru,s, while they are still moi'e 

 depressed in Amphiholurus. The last intercentrum lies between 

 vertebrae 5 and 6. 



The ribs of Physignathus ai'e in all 19 pairs, of which the fifth 

 to the eighth pairs reach the sternum. The first two pairs show 

 a peculiarity not observable in Chlamydosauriis. Each is expanded 

 at its free end, this expansion being specially marked in the 

 case of the second. The last of the sternal ribs is attached much 

 nearer to the proximal end of the xiphisterna than is the 

 corresponding rib of Chlamydosaurus. The sternum itself has in 

 Physignathus the usual two foi-amiiia present in so many lizards. 

 It is only the last of the dorso-lumbar series that has no free 

 ribs 



3. A Note on the Brain of the Black Ape, Cynopitliecus niger. 

 By Fkank E. Beddard, M.A,, F.R.S., Prosector to tlie 



Society. 



[Received November 29, 1904.] 

 (Text-figures 11 & 12.) 



In a recent communication to this Society*, I described among 

 a number of others the brain of Cynojnthecus niger, the Celebesian 

 Black Baboon. That brain is still in my possession and is that of 

 a female. Since then I have been able to compare this brain 



* r. Z. S. 1903, vol. i. p. 12. 



