SUBORBER D 



SIRENIA 



265 



one canine, and three premolars are found. Recent, inhabiting the eastern 

 coast of America. Fossil in the Pliocene of South Carolina and Argentina. 

 Manatherimn Hartlaub. Oligocene ; Belgium. 



Eotherium Owen. Dental formula : 



3.1.4.3. 



3.1.4.3. 

 disappearing. Middle Eocene ; Egypt. 



Eosiren Andrews (Fig. 351). Dental formula. 



molariform. Muzzle overlapping. Upper Eocene ; Egypt. 

 Profosiren Abel. Upper Eocene ; Egypt. 

 Halitherium Kaup (Halianassa Meyer) (Fig. 352). Skeleton about three 



Second premolar soon 

 Last premolar 



Fig. 351. 



Eosiren fraasiAhelsp. Upper 

 Eocene, Fayum, Egypt. Palatal 

 aspect of skull, i/e. (After 

 Andrews.) 



Fig. 352. 



Halitherium sehinzi Kaup. Oligocene, Flonlieim, Hesse Darmstadt. 

 A, Skull from above. B, Palatal aspect, i/e- (After Lepsius.) 



metres long. Premaxillary curved downwards, with one pair of long 

 cylindrical incisors. Parietal bones long, narrow ; frontals short. Nasal 

 bones shield-shaped, short, situated posterior to the large narial aperture. 

 With the exception of the pair of superior incisor teeth, incisors and canines 



early deciduous. Cheek teeth : j- r-, bunodont, with warty transverse ridges ; 



the three anterior teeth small, monocuspid, and single rooted, early deciduous. 

 Abundant in the Eocene ; Ronca, Italy. H. veronense de Zigno. Oligocene ; 

 Mayence Basin, Switzerland and France. H. sehinzi Kaup. Miocene. H. 

 christoli Fitzinger. 



Metaxytherium Christol. Like Halitherium, but only from four to five 

 cheek teeth. Miocene. M. cuvieri Christol, 31. krahuletzi Deperet. Pliocene. 

 M. serresi Gervais. 



Felsinotherium Capellini (Fig. 353). Dental formula: 



1.0.5. 

 0.0.5.' 



Second pre- 



