166 Wortman — Studies of Eocene Mammalia in the 



ing additional genera of the Insectivora : viz., Gymnura, 

 Tupaia, Talpa, Scalops, Condylura, Sorex, Myogale, Cen- 

 tetes, Hemieentetes, Ericulus, Solenodon, Chrysochloris, Lep- 

 tictis, and Ictops. This list, it will be seen, includes typical 

 representatives of all living families except the Macroscelidse 

 and Potamogalidse. I have not been able to examine the 

 skulls of any members of these two families, but I have very 

 little doubt that it is true of them also, and that this course of 



Figure 101. — View of the base of the skull of Lemur catta. 



apf, anterior palatine foramen ; ppf, posterior palatine foramina ; /o, 

 foramen ovale ; ec, eustachian canal ; pgf, postglenoid foramen ; earn, exter- 

 nal auditory meatus ; ac, accessory carotid canal ; smf, stylomastoid foramen ; 

 flp, foramen lacerum posticum ; cc, carotid canal ; cf, condyloid foramen. 



the artery is a constant and important diagnostic feature of the 

 Insectivore skull. It is of interest to note that in Galeopithe- 

 cus the course of the artery is not like that in other Insec- 

 tivora, but agrees with that of the bats and one important 

 group of the lemurs. It may be also added that this course of 

 the artery, according to Owen,* is true of some, if not all, 

 Kodentia. The practical application of this knowledge of the 

 course of the entocarotid, to the classification of certain fossil 



* Anatomy of Vertebrates, 1868, vol. iii, p. 229. 



