Alcide cVOrligny. 97 



Comparison of d'Orbigny's Four Tables op Genera, etc.— conHmied. 



" Cours Elementaire de 

 to which he removed 



In 1852 he instituted a new family in the 

 Paleoutologie," which he called Cyclostegues, 

 €yclohna (from the Helicostegues), and to which he added the genera 

 'Orbitolites, Orbitolina, and Orbitoides. (See note 31.) 



Feh. 21st, 1917 H 



