CLASSIFICATION 59 



Neumayr's classification (1887) recognises three 

 main groups, namely, the irregularly formed arena- 

 ceous types (Astrorhizids) ; the regularly formed 

 arenaceous types ; and the calcareous types. The 

 2nd and 3rd groups are again di\dded into two 

 parallel and isomorphous series which comprise the 

 following fundamental types : A, Coi-uusjnra ; B, 

 Textularia ; C, Lituola ; D, FusuUna. 



In 1895 Dr. L. Rhumbler published his ' Entwurf 

 eines natiirlichen Systems der Thalamophoren.' He 

 divides the group into ten Families, and by a diagram 

 points out a probable evolution of types from simple 

 arenaceous tubes to the highly differentiated Rotaline 

 shell-structure. 



The Families are numbered in the following- 

 order : — 



1. Ehabdamminidae. 6. Orbitolitidce. 



2. Ammodiscidae. 7. Textularidae. 



3. SpirillinidfB. 8. Nodosarida^ ] Lage- 



4. Nodosinellidte. 9. EndothyridcT ) ninse. 



5. Miliolinidce. 10. Rotalidcie. 



Ehumbler considers that the Lagenince were 

 derived from the nodosarine type of shell by a 

 permanent separation of the chambers. 



Eimer and Fickert (1899) have published an 

 elaborate and well-illustrated treatise on the mor- 

 phology and relationship in the Foraminifera,' and 

 propose a new classification of the group. There are 

 many strong points in this scheme which deserve 



' ' Die Artbildnnj,' unci Verwandtschaft bei den Foraminiferen,' 

 TilLingcr ZoologiscJic Arhciteu, Band iii. No. 6. 1899. 



