214 FORAMINIFERA 



Genus HETEROCLYPEUS Schubert, 1906 

 Genoholotype, Heterostegina cycloclypeus A. Silvestri 



Heteroclypeus Schubert, Centralbl. fiir Min,, 1906, p. 640. 



Test similar to Heterostegina in the young but the chambers 

 becoming annular in the later development. 

 Tertiary. 



Genus CYCLOCLYPEUS W. B. Carpenter, 1856 



Plate 29, figure 13; plate 30, figure 8 

 Genotype, by designation, Cycloclypeus cai'penteri H. B. Brady 

 Cycloclypeus W. B. Carpenter, Phil. Trans., 1856, p. 555. 



Test in the microspheric form like Heterostegina in the early 

 stages, later with the chambers becoming annular, divided by 

 radial portions into rectangular chamberlets, the test discoidal 

 and much compressed. 



Miocene to Recent. 



EXPLANATION OF PLATE 30 



Camerinidae 



Fig. 



1. Archaediscus karreri H. B. Brady. (After H. B. Brady), a, side 



view; b, edge view; c, section. 



2. Nuimmdostegina velibitana Schubert. (After Schubert). a, side 



view; b, edge view. 



3. Camerina budensis (Hantken). (After Hantken). a, side view; b, 



edge view; c, section. 



4. Operculinella cumingn (Carpenter). (After H. B. Brady), a, side 



view; b, edge view. 



5. Assilina nndata d'Orbigny. (After d'Orbigny). a, side view; b, edge 



view. 



6. Operculina bartschi Cushman. 



7. Heterostegina depressa d'Orbigny. (After H. B. Brady), a, side 



view; b, edge view. 



8. Cycloclypeus guembelianus H. B. Brady. (After H. B. Brady), a, 



side view; b, edge view. 



