232 PHYSIOLOGICAL SERIES. 



There is a typical, short, vertical calcarino sulcu- 

 behind the upper half of the hippocampal fissure. 

 that of the Sloths, it does not join the intercalary suleus. 

 It, however, presents as an interesting peculiarity a short 

 retro-calcarine branch, just as the homologous sulcus doe.- 

 in the Lemurs. 



There is an elongated intercalary sulcus of about twice 

 the length of the small corpus callosum. In front it joins 

 a short, oblique, rostral sulcus. 



It is a very suggestive fact that the intercalary sulcus, 

 which is quite independent of the calcarinein the Anteatcr- 

 and Sloths and in no other mammals except the Primates, 

 should also be separated from the calcarine sulcus in the 

 Pangolin. 



The Sylvian region [which unfortunately is irretrievably 

 damaged in this specimen] presents very interesting 

 features. In another damaged specimen [in the Museum 

 Store Room] the posterior rhinal fissure, which is placed 

 high up on the lateral aspect, is prolonged forward into a 

 very deep orbital (presylvian) sulcus. Gervais and AVcber 

 have recorded further instances of a similar condition in 

 Mania. This complex of posterior rhinal fissure and orbital 

 sulcus resembles the arrangement seen in the Armadillos 

 and, more distantly, the condition found in Orycten>i>n.<. 

 Tapirus, and Moschus (vide infra). In this particular 

 specimen (D. 287), however, the left orbital sulcus is 

 certainly not joined to the rhinal fissure. 



The short anterior rhinal fissure does not reach so far 

 back as the anterior extremity of the posterior rhinal. In 

 this respect it resembles that of the Armadillos. A short, 

 oblique " Sylvian fissure" springs from the posterior rhinai 

 fissure, just where the latter joins, or appears to join, the 

 orbital sulcus. The appearance of the " Sylvian " and 

 orbital elements recalls that presented in Galeopitfwcu** 

 There is a typical semicircular suprasylvian >ulcu> pn- 

 ing an arcuate form. There is also a typical, sagit tally- 

 directed lateral sulcus. 



The cerebellum and the other parts of the brain are not 

 unlike those of the Sloths, or, rather, present feature- 

 intermediate between those of the Armadillos and Slotli-. 



