foramlntfera. 
83 
k ™ Piledttr^r 1 iU segments > s P ira % arranged. Cham- 
% 19 we have a horizon f T '"l- aX1S ’ formm g a s P iral erection. In 
involutions are visible on ! T” ° f Fa ^ aaina > k which the spiral 
visible on the truncated half of the shell. 
Fi g. 14. Operculina. 
IV. Entomostega Am" i " iS ' 19 ' I '’ < " !iasiaa - 
ing a spiral. Chambers superset ^ 8e S>nents form- 
forming a spiral. 1 1 d on tw o alternating axes, also 
MW 
mmi 
Fig ' l5 ' N ”nw»uli« S lenticiiluns. 
V- Enallostega.- Animal formed 
• IG. Cassrdulina. 
of alternate segments. Non-spiral 
Fig- 11- Textilaria. 
’ “ Ucr “ 8lj ^ *» « «u» a« s .,I M non 
G 2 
