71 (70) Sac is elongate, has an apical spine; neck is typically set at a slight angle. Length 0.50-0.55 



mm Lagena clavata 



X75 



72 (70) Wall is finely striate; neck is ornamented by concentric rings. Diameter 0.20 



mm Lagena striata 



XlOO 



yX50 



72 (70) Test consists of an elongate tube, closed at one end and swollen in the central part; wall is finely 



striate. Length > 0.70 mm; diameter 0.1 2-0. 18 mm Lagena mollis 



73 (69) Sac is circular in section ^'* 



73 (69) Sac is compressed ^^ 



w 



XlOO 



74 (73) Sac is unornamented. Length about 0.30 mm; diameter about 0.22 mm. a. Side 



view; b, top view Oolina globosa 



74 (73) Sac is ornamented 75 



25 



