FORAMINIFERA 



81 



Fig. 15. — Vertebralina. Fig. 16. — Textularia. 



Fig. 17. — Spiroloculina. Fig. 18. — Trochammina. 



j m 



Fig. 19.— Lagenid^ (various). Fig. 20.— Polystomella 



TYPES OF FORAMINIf ERA. 

 (Drawn by Messrs. Heron-Allen and Earland.) 



