PLATE XXXIII. 



From the Upper Greensand. 



Fig. 1 a. Salenia PKTALiriSRA, Desmarest. Test, natural size. British Museum. 



„ Upper surface, showing disc in situ, magni- 



fied two diameters. 



,, Lateral view of the same test, magnified two 



diameters. 

 Ambulacra, inter-ambulacra, and poriferous 

 zones, magnified four diameters. 



„ Apical disc detached, magnified four dia- 



meters. 



„ Single primary tubercle profile, magnified 



four diameters. 



„ Under surface, showing mouth opening and 



peristome, magnified two diameters. 



„ Ambulacra and poriferous zones, magnified 



six diameters. 



,, Inferior portion of inter-ambulacra, mag- 



nified six diameters. 



„ Upper surface of another fine test, Mr. 



Cunnington, F.G.S. 

 „ Under surface, do., do. 



