50 THE SKELETON OF THE CAT. 
(g) curving out some distance laterally. The following bones 
are visible in dorsal view: the occipital (1), interparietal (2), 
parietals (3), temporals (4), frontals (5), malar or zygomatic 
. Fic. 39.—SKULL, DoRSAL SURFACE, 
I, occipital bone; 2, interparietal bone; 3, parietal bones; 4, temporal; 5, frontal; 
6, malar; 7, nasal; 8, maxillary; 9, premaxillary; 10, lachrymal. @, lambdoidal 
ridge; 4, external occipital tubercle; ¢, sagittal crest; ¢, parietal eminence; ¢, line 
which forms the dorsal boundary of the temporal fossa; /, zygomatic process of the 
frontal; g, zygomatic arch; 4, frontal process of the malar; z, supraorbital arch; 7, 
nares; 2, foramen incisivum or anterior palatine foramen; /, sphenopalatine foramen; 
m, zygomatic process of the temporal; 7, infraorbital foramen; 0, opening of lach- 
rymal duct. 
bones (6), nasals (7), maxillaries (8), premaxillaries (9), and 
lachrymals (10). 
The caudal boundary of the dorsal surface is marked by the 
prominent lambdoidal ridge (a) which passes from the middle 
cranioventrad along each side to the root of the zygomatic 
arch: it is borne by the occipital and temporal bones. From 
the middle of the lambdoidal ridge a second ridge, the sagittal 
