PLATE XXXII. 



From the Upper Greensand. 



Fig. 1 n. Peltastes CLATHRATUs, ^y«5s/0. Test, natural size. British Museum. (P. 156.) 



„ ,, Upper surface, showing the disc in situ, 



magnified two diameters. 



,, „ Under surface, showing mouth opening and 



peristome, magnified two diameters. 



„ „ Ambulacra and inter-ambulacra, with pori- 



ferous zones, magnified six diameters. 



,, „ Single plate and portion of ambulacra with po- 



riferous zones, magnified eight diameters. 



„ „ Mouth opening, magnified four diameters. 



„ „ Apical disc detached, magnified four dia- 



meters. 



„ ,, Lateral view of another test, magnified two 



diameters. 



„ „ Apical disc detached, magnified two dia- 



meters. 





1 b. 





1 c. 





1 d. 





1 e. 





1/ 



Fig. 



2. 



Fig. 



3. 



Fig. 



4. 



