PLATE VII. 



Pseudodiademas from the Cornbrash. 



Fig. 



1 a. PsEUDODiADEMA Bailyi, Wric/ht, p. 120. Upper surface of the test, natural size. 



b. Under surface and mouth opening of the same, natural size. 



c. Lateral view of the same, natural size. 



d. Half of the base, showing the peristome, &c., magnified three diameters. 

 €. Half of the upper surface, magnified three diameters. 



/. One inter-ambulacral plate, and a portion of an ambulacral area, with the poriferous 



zones; magnified six diameters. 

 g. A plate and tubercle, seen in profile, magnified six diameters. 



2 a. PsEUDODiADEMA Bakeri^e, Woodward, p. 121. Upper surface of the test, natural size. 



b. Lateral view of the same, natural size. 



c. One inter-ambulacral plate, and a portion of an ambulacral area, with the poriferous 



zones ; magnified four diameters. 



Pseudodiademas from the Coralline Oolite. 



3 a. PsEUDODiADEMA RADiATA, Wright,^. 131. Upper surface of the test, natural size. 



b. Under surface of the test, natural size. 



c. Lateral view of the test, natural size. 



d. The half of the upper surface, magnified three diameters. 



e. The half of the under surface, magnified three diameters. 



/. One inter-ambulacral plate, and a portion of an ambulacral area, with the poriferous 



zones ; magnified six diameters. 

 ^. An inter-ambulacral plate and tubercle, seen in profile, magnified six times. 



4 a. PsEUDODiADEMA VERSiPORA, Phillips, p. 124. Upper surface of the test, natural size. 



b. Base and mouth opening of the same, natural size. 



c. Lateral view of the same, natural size. 



d. Half of the upper surface, magnified two diameters. 

 €. Half of the under surface, magnified two diameters. 



/. One inter-ambulacral plate, and a portion of an ambulacral area, with the poriferous 



zones ; magnified four diameters. 

 c/. An inter-ambulacral plate and tubercle, seen in profile, and magnified four times. 



