67 (66) Apertural tooth is long, broader at free end than at base; test is nearly circular in 



outline. Length 0.55-0.80 mm. a, Side view; b, top view Triloculina concisa 



67 (66) Apertural tooth is short and bifid; test is longer than broad; the final chamber 

 overhangs the widely open aperture in a hoodlike fashion. Length 0.35-0.45 mm. 

 a, Side view; b, top view Triloculina brevidenlala 



68 (53) Test is single chambered 



68 (53) Test has more than one chamber . 



.69 



.77 



69 (68) Test is a simple sac 



69 (68) Saclike test possesses an internal tube (observable by use of clarifying oil and transmitted light) 



.70 

 .73 



70 (69) Wall is unornamented 



70 (69) Wall is ornamented 



.71 

 .72 



71 (70) Sac is rounded; wall is smooth. Length about 0.35 mm Lagena laevis 



24 



X75 



