754 



EODENTIA 



Third upper molar not longer than second, its inner 

 side normally with two re-entrant angles. 

 Outer triangles of vi^ well developed, with three 

 definite enamel sides and a distinct central 

 osteodentins area normally isolated or nearly 

 so from that of inner triangle and posterior 

 loop ; middle outer salient angle as long as 

 anterior and posterior salient angles (third 

 inner re-entrant angle present in rare indi- 

 vidual cases) savii group. 



Brain-case much depressed, its dorsal profile 

 nearly flat from nasal to back of interparietal 



(Pyrenees) P. planiceps, p. 772. 



Brain-case not much depressed, its dorsal profile 

 evidently convex. 

 Interparietal irregularly lozenge-shaped, its 

 lateral extremities acute, scarcely or not 

 in contact with temporals; first and 

 second triangles of vi^ broadly communi- 

 cating P. gerbii, p. 773. 



Interparietal strap-shaped, its lateral extremi- 

 ties truncate, broadly in contact with 

 temporals ; first and second triangles of 

 7)1^ usually isolated. 

 General outline of brain-case sub-quadrate, 



the upper surface rather flat (Italy) ... P. savii, p. 7G8. 

 General outline of brain-case not evidently 

 sub-quadrate, the upper surface rounded 

 off at sides. 

 Mesopterygoid space rather wide (Sicily) P. nebrodensis, p. 770. 

 Mesopterygoid space narrow (South- 

 western France) P. pyrcnaicns, p. 770. 



General colour above clear hair-brown 

 without noticeable yellowish cast 



(Pyrenees) P. i). pyrenaicus, p. 771. 



General colour above brown with a 

 noticeable yellowish cast (Plains 



of south-western Prance) P.p. brunneus, p. 772. 



Outer triangles of m^ not well developed, usually 

 opening widely into inner triangle and pos- 

 terior loop, the central osteodentine area 

 small or absent ; middle outer salient angle 

 noticeably shorter than anterior and posterior 

 salient angles, sometimes nearly obsolete 

 (third inner re-entrant angle never present)... ibericus group. 

 Upper incisors moderately long and not strongly 

 projecting, not a highly conspicuous feature 

 of skull as viewed from above. 

 Brain-case much flattened, the occipital depth 

 about one-half occipital breadth (Central 



Spain) -. P. deprcssiis, p. 779. 



Brain-case not much flattened, the occipital 

 depth noticeably more than one-half 

 occij)ital breadth. 

 Upper incisors slightly projecting (Portugal) P. lusitanictcs, -p. 776. 

 Upper incisors nearly vertical. 



Skull narrow ; outline of brain-case dis- 

 tinctly elongate (North-western 



Spain) P. mari.T, p. 777. 



Skull broad ; outline of brain-case not 

 specially elongated (North-central 

 Spain) P. pelandonius,'p.178. 



