294 Dr. C. W. Andrews — Extinct Vertebrates from Egy])t. 



of the skull, particularly of the rostrum, Prototherium veronense seems 

 to be closely similar to the Fayum form, but since it is very doubtful 

 on the one hand whether it possessed canines and posterior incisors, 

 and on the other, whether the process on the mandible which 

 characterizes it, is present in the Egyptian form, it is best to establish 

 a new genus for the reception of the latter. 



pmz m: 



Skull and mandible of Eosiren libyca. One-third uatui-al size. 



Figs. 1 and 2.— Skull. Fig. 3.— Mandible. 



p.f. palatine foramen ; i^ first incisor ; «2, js, second and third incisors ; c, canine ; 



p.m.^ last premolar ; m^, m^, first and fourth molars. 



The name Eosiren may be adopted for this genus, which will 

 include Eocene Sirenians in the upper jaw of which the anterior 



