The Sarcodina 253 



Fig. 5. 36. A, B. Iridia serialis Le Calvez, arenaceous test, upper and lower 

 surfaces; xl9 (after Le C). C, D. Webbinella crassa Rhumbler, lower and 

 upper surfaces of hemispherical test; pseudopodia are extended between 

 base of test and substratum; x23 (after Le Calvez). E. Allogromia laticollare 

 Arnold, half of approximately spherical test (diameter, \OOA50fi), showing 

 aperture (after A.). F, G. Test of Camerina elegans, dissection showing septa 

 and foramina (F), external view showing sutures (G); x5 (after Jones). H, I. 

 Central portions of test in Planorbulina mediterranensis d'Orbigny, megalo- 

 spheric type (H) and microspheric type (I); xlOO (after Le Calvez). 



Colored granules or globules (xanthosomes) — brown, reddish, or yel- 

 low — are commonly seen in the myxopodia. Such inclusions often occur 

 in the endoplasm, from which they apparently pass outside to be dis- 

 carded in the trails left by retracted pseudopodia. The chemical nature 

 of the xanthosomes is unknown, although they are often referred to as 



