90 (89) Unornamented, sutures are slanting, test thick, slightly 

 twisted; fine wall perforations are present only over the lower 

 part of each chamber, leaving the upper part clear. Length 

 about 0.35 mm. a, b, Side views 90° apart; c. Side view as 

 seen by transmitted light Brizalina pseudopunctata 



X150 



91 (90) Wall is smooth, coarsely perforate. Length 0.35-0.40 mm. a. Side view; b, top 



view Bolivina variabilis 



X120 



91 (90) Wall is rugose. Length 0.30-0.40 mm. a. Side view; b, top view Bolivina pseudoplicata 



92 (86) Test is multiserial, small, slender, ovate; as many as 10 chambers in one whorl; aperture 



is relatively large. Length 0. 18 mm Buliminella elegantissima 



92 (86) Test is triserial 



31 



