78 (77) Test is attached, consisting of a laterally affixed 

 polymorphinid surrounded by a broad flange by which 

 it is cemented to its shell or rock support; apertures are 

 a few small mounded pores on the peripheral flange. 

 Diameter 0.45-0.75 mm. Illustrated specimen is 

 attached to shell fragment Webbinella concava 



78 (77) Test is not attached 79 



79 (75) Aperture is radiate 80 



79 (78) Aperture is not radiate 86 



X75 



80 (79) Test has an internal tube; coiling is sigmoiline; chambers are not inflated. Length 



about 0.50 mm. a, Side view; b, basal view Laryngosigma williamsoni 



80 (79) Test lacks an internal tube 81 



81 (80) Test is elongate or flattened; chambers are little overlapping; coiling is biserial 82 



8 1 (80) Test is compact and chambers are much overlapping 83 



27 



