102 (lOI) Wall is uncomplicated by surface structures; chambers are slightly 

 inflated, periphery is bluntly rounded; umbilicus is slightly 

 depressed, obscured by fine papillae. Diameter 0.32-0.52 mm. 

 a. Side view; b, edge view Haynesina germanica 



X75 



102 {101) Umbilicus is covered by a star pattern of flaps. Diameter 0.30-0.35 



mm. a. Side view; b, edge view Astrononion gallowayi 



103 (101) Test is the same on both sides; chambers increase rapidly in 

 thickness as added. Length 0.40-0.70 mm. a. Side view; b, edge 

 view Nonionellina labradorica 



103 (101) The two sides of the test are different 104 



104 (103) Test has a bulging lobe that covers the umbilicus on 

 one side; chambers are narrow and elongate. 

 Length about 0.22 mm. a. Spiral view; b, umbil- 

 ical view; c, edge view Nonionella turgida 



104 (103) Test shows early coil on one side, but no V/ I J^^ V /^ ^""^ 

 lobe; umbilicus is papillate. Length 0.32-0.52 ^^'^ X 1 



mm. a. Spiral view; b, umbilical view; c, 



edge view Pseudononion atlanticum 



105 (100) Periphery is angled and limbate 106 



105 (100) Periphery is rounded 107 



34 



