Plate 31. 



Fig. 1. Cristclldiid until lea. X2.i. Side view. 1)2377. 



2,3. Cri.steUaria ohtumta, var. sidialata. X20. Side views. D267S. 

 4,5. Cristellaria calcar. X30. Side views. Fi.uure 4. form witli inflated 

 test and very short spines. D2377. 



209 



