PLATE LXXVI. 



The German type-form from Weddingen, near Hanover. 



Fig. 1 a. MiCRASTER COR-TESTUDINARIUM, Goldfuss. Upper surface, natural size. My 



collection. (P. 335). 



\ b. — — — Lateral view, do. 



1 c. — — — Under surface, do. 



\ d. — — — Ambulacral area, poriferous zones, 



and interambulacral plates, 

 magnified. 



\ e. — — — Primary tubercles in granulated 



surface, magnified. 



1 /. — — — Primary tubercles, under side, 



magnified. 



English specimen type-form from Purley, Surrey. 



2 a. MiCRASTER COR-TESTUDINARIDM, Goldfuss. Upper surface, natural size. My 



collection. 



2 b. — — — Under surface, do. 



2 c. — — — Petaloidal ambulacra and pori. 



ferous zones, magnified. 



2d} — — — Apical disc, showing the circle 



of ovarial and ocular plates, 

 with the summits of the 

 ambulacra magnified. 



2 e. — — — Primary tubercles on upper sur- 



face, with granules on 

 magnified. 

 1 Written l** in error on the Plate. 



