224 FORAMINIFERA 



Broeckina Munier-Chalmas and Orbitopsella Munier-Chalmas 

 have been placed in this family but it is to be suspected that 

 their relationships are elsewhere. A study of microspheric 

 forms in their early stages is essential to their final disposition. 



The two very peculiar genera Rhapydionina Stache, 1912, 

 and Rhipidionina Stache, 1912, may be connected with this 

 family. Their developmental stages are not fully known and 

 until they are studied in detail, their relationships must remain 

 obscure. 



FAMILY 27. ALVEOLINELLIDAE 



Test imperforate except the proloculum and second chamber ; 

 general shape of the test fusiform, coiled about an elongate 

 axis; chambers completely involute, divided into chamberlets; 



EXPLANATION OF PLATE 32 



PENEROPLIDAE, ALVEOLINELLIDAE, KeRAMOSPHAERIDAE 



Fig. 



1-4. Marginopora vertebralis Quoy and Gaymard. Figs. 1-3, (After 



H. B. Brady). X 12. Fig. 1, Viewed from broad surface. 



Fig. 2, Peripheral view. Fig. 3, Section. Fig. 4, (After Car- 

 penter). Portion of ideal .section. 

 Sorites. Idealized median section. (After H. Douville). 

 Orhitolites. Idealized median section. (After H. Douville), 

 Opertorbitolites douvillei Nuttall. X 10. (After type figure). 

 Sorites orbicidus (Forskal). (After Ehrenberg). Fig. 8, From 



flat side. Fig. 9, From periphery. 

 Antphisoriis hentprichii Ehrenberg. (After type figure). 

 Borelis melo (Fichtel and Moll). X 35. (After H. B. Brady). 



Fig. 11, Side view. Fig. 12, End view. Fig. 13, Transverse 



section. Fig. 14, Longitudinal section. 

 FlosGuliyia globosa (Leymerie). X 3. (After Nuttall). Fig. 15, 



Transverse section. Fig. 16, Longitudinal section. 

 Alveolinella boscii (Defrance). (After H. B. Brady). Fig. 17, 



Side view. Fig. 18, End view. X 10. Fig. 19, Transverse 



section. X 15. 

 Craterites rectus Heron-Allen and Earland. X 20. (After type 



figure), a, side view; b, from above. 

 Kera^nosphaera mnrrayi H. B. Brady. (After type figures). Fig. 



21, Exterior, x 15. Fig. 22, Section, x 65. 



