PLATE LV. 



Catopygus Vectensis, Wright, nov. sp. 



Lower Greensand. 



Fig. 1 a. Test, natural size, upper surface. Rev. T. Wiltshire, F.G.S., and my collection. 

 (P. 245.) 



b. Do. magnified two diameters. 



c. Do. lateral view, magnified two diameters. 



d. Do. posterior do. do. do. 



Catopygus columbarius, Lamarck. 



From the Upper Greensand. 



Fig. 2 a. Test, upper surface, natural size. My collection. (P. 241.) 



h. Do. do. magnified two diameters. 



c. Do. uhaer surface do. do. 



d. Do. lateral view do. do. 



e. Do. posterior do. do. do. 

 /. Apical disc, largely magnified. 



y. Ambulacral and inter-ambulacral plates, with poriferous zones, magnified six 



diameters. 

 //. Mouth, oral lobes, and peristomal rosette around the opening, magnified six 



diameters. 

 i. Tubercles from the base highly magnified. 



