PLATE LXVIL 



Cardiaster latissimus, Agassiz. 



From the Tipper Greensand. 



Fig. 1. Upper surface, natural size. My Cabinet. (P. 295.) 



2 a. Under surface, natural size. Rev. T. Wiltshire's, F.G.S., Collection. 



b. Lateral view do. 



c. Posterior border do. with periprocte and vent. 



d. Anterior do. do. with anteal sulcus. 



e. Dorsal plates and primary tubercles with granules, magnified three times. 

 f. Ambulacral pores, magnified three times. 



y. Primary tubercles from the base. Magnified. 

 h. Apical disc, magnified. 



