PLATE XLV. 



CoTTALDiA Benetti^, Koniff, 1825. 



From the Upper Greemand. 



Fig. I a, 2 a, 3. Lateral views of tests, natural size. My collection. (P. 187.) 



d. Upper surface of test, showing the apical disc, magnified two dia- 

 meters. My collection. 



c. Under surface of same, showing the base and peristome, do. do. 



d. Lateral view of do. do. the lobe-like character of the areas, do. 



e. Portion of the inter-ambulacral and ambulacral areas and poriferous 



zones, showing the linear arrangement of the tubercles on the 



plates, magnified ten times. 

 /. Portion of the inter-ambulacral plates and tubercles at the base, 



magnified ten times. 

 ff. Apical disc complete, do. magnified six times. 



DiscoiDEA SUBUCTJLUS, K/ein, 1734. 



From the Upper Greensand and Grey Chalk. 



Fig. 4 a. Lateral view of test, the natural size. My collection. (P. 200.) 

 h. Upper surface of same, magnified two diameters. 



c. Under do. do. do. do. 



d. Lateral do. do. do. do. 



e. Apical disc, magnified twelve times. 



/. Upper portion of inter-ambulacral areas, do. 



y. Plates of inter-ambulacra, ambulacra, and poriferous zones, magnified eleven 



times. 

 h. Do. do. do. do. at base, do. do. 



Fig. 5. Large test from the Grey Chalk. 

 6. Small test, conical variety, do. 



