294 PHYSIOLOGICAL SERIES. 



The orbital and coronal sulci are arranged as in Od<>l> 

 There are some fragmentary paracoronal sulci between 

 them. The coronal joins a long, sagittal, lateral siiU-u> 

 which is placed close to the mesial plane and is very drop. 

 It extends on to the posterior pole. It is probably homo- 

 dynamoiis with the entolateral (paracalcarine) sulcus of 

 Otaria, Odoba'iius, and the Bears. 



The postlateral is represented by a horizontal sulcu- 

 below the postsylvian, but the analogy is by no means 

 exact. 



There is a short, deep, crucial sulcus, the mesial branch of 

 which is short and not joined to the intercalary. There is 

 also a deep and well-defined precrucial branch, but it i> 

 placed wholly on the mesial surface, so that the "Ursine 

 lozenge," although exceedingly clearly defined, is not 

 visible upon the dorsal, or rather anterior, surface of the 

 hemisphere. 



A sulcus joined to the genual sulcus bisects this " lozen r 

 as in Otaria and some Bears. 



The calcarine resembles that of Otaria. Its lower ex- 

 tremity joins a long horizontal sulcus. The small ursine 

 sulcus is joined to the posterior rhinal fissure. The inter- 

 calary sulcus is independent both of the calcarine, genual, 

 and crucial sulci. 



The cerebellum in all the Seals conforms to the Car- 

 nivore type already described in the case of the Cat. Its 

 shape, however, is variously moulded in the different genera 

 by the backward growth of the hemispheres. 



The flocculus and both of the paraflocculi are very la 

 and richly foliate, without, however, losing the general 

 resemblance in form to that of the Cat. 



A large part of the dorsal surface is formed by the richly 

 branched leaf-like lateral expansions of the second lobule 

 of the middle lobe (see account of Cat's cerebellum). The 

 folia of the lateral parts of the third lobule are much more 

 immeroilB, and as a result have lo-i ulartrnii- 



arran^ement, seen in the Cat. 0. C. 1^"' ' 



Fhitau \ Jacobsohn, Vergl, Anal. d. Centralnervensyst 

 gethiere, L899, p. 304, 



