T1IK KOCKXK SEItlKS 



Pachynolophus, Paloplotherium, all related to tapirs and rhinoceroses, 

 with Ifyracotheriinn, which combined characters now found in the 

 coney (Hyrax) and in the pigs. Other hog-like animals (Hyopotamus) 

 appear in the Upper Eocene and become common in Oligocene 

 time There were also primitive hornless forms of deer or antelope 

 named Dichodon and Amphitragalus. Early forms of the Probos- 

 cidea have been found in the Upper Eocene of Egypt. Sirenia are 

 represented by Eotherium, etc. The rodents were represented by 



Fig. 176. FOSSILS OF THE THAXBT BEDS. 



a. Cuculhfa decussata. 



b. Pectunculus terebratularis. 



c. Protocardium Laytoni. 



d. Cyprina planata. 



i . 1'lioladomya cuneata. 



/. Corbula regulbiensis. 



g. Aporrhais Sowerbyi. 



Theridomys and Sciuroides, and the primates by the Lemuroid 

 Microchcerus. 



Characteristic Fossils. The following are some of the 

 commoner and most characteristic species of invertebrates found in 

 the marine and estuarine deposits offthe Eocene Series : 



Fossils of the Thanet Beds 



Lamellibranchia. Protocardia Laytoni, Corbula regulbiensis, Cuculljea 

 decussata ( = crassatina), Pectunculus terebratularis, 

 Cyprina scutellaria ( = ]>lanata), C. Morrisi, Astarte 

 tenera, Pholadoniya cuneata. 



Gastropoda. Aporrhais Sowerbyi, Trophon subnodosum, Scala 



Bowerbanki. 



1' M 



