PLATE III. 



Calliderma latum, Forbes, sp. (P. 12.) 



From the Lower Chalk. 

 Fig. 



1 a. Actinal aspect of an example from Amberley ; natural size. (Coll. Brit. Mus.) 



b. Lateral view of the margin ; natural size. 



c. Lateral surfaces of the marginal plates ; magnified. 



d. An infero-marginal plate ; magnified. 



e. An actinal intermediate plate ; magnified. 



2 a. Actinal aspect of an example from the Chalk Marl of Dover ; natural size. 



(Coll. Brit. Mus.) 

 b. An adambulacral plate ; magnified . 



3 a. Actinal aspect of an example from Washington, with a portion of the 



actinal floor removed, showing the stellate bases of the abactinal plates or 

 paxillffi; natural size. (Coll. Brit. Mus.) 

 b. Stellate bases of the abactinal plates or jiaxillge ; magnified. 



