PLATE LXIV. 



EcHiNOSPATAGus Mdrchisonianus, Mantell. 

 From the Upper Greensand. 

 rig. 1. Test, upper surface, natural size. My collection. (P. 2S1.) 



Enallaster Greenovii, Forbes. 



From the Upper Greensand. 



Fig. 2 a. Upper surface, natural size. Royal School of Mines. (P. 290.) 

 b. Under do. do. 



, c. Posterior do. do. 



d. Anterior do. do. 



e. Lateral do. do. 



/. Apical disc and structure of ambulacra, magnified. 

 3 a. Smaller test, lateral view. 



b. Plates, with tubercles from upper surface, magnified. 



c. Tubercles from under surface, do. do. 



d. Do. do. 



EcHiNosPATAGUs CoLLEGNii, Sismonda. 

 From the Upper Greensand. 

 Fig. 4. Test, upper surface, natural size. My Collection. (P. 283.) 



