MARYLAND GEOLOGICAL SURVEY 



471 



chambers numerous, nine or ten in each series; septa somewhat curved, 

 short. It is the most common variety of the TextulanoB. As a fossil 

 it dates back to the Cretaceous period. It occurs at all depths and lati- 

 tudes at the present time and is one of the most widely distributed of the 

 Foraminifera. 



Occurrence. — Choptank Formation. Jones Wharf, 1 mile north 

 of Governor Eun. Calvert Formation. Plum Point, Chesapeake 



Beach. 



Collection. — Maryland Geological Survey. 



Textularia articulata d'Orbigny. 

 Plate CXXXII, Figs. 6, 7. 



Textularia articulata d'Orbigny, 1846, Foram. Fossiles Vienne, p. 250, pi. xv, tigs. 



16-18. 

 Textularia articulata Bagg, 1898, Bull Amer. I'al., No. 10, p. 10. 



Description.— "Ye^i rather broad and laterally compressed; tapering 

 only slightly towards the posterior end, which is somewhat rounded; 

 peripheral margin sharp, provided with a marginal keel encircling the 

 sides of the entire shell; chaml^ers numerous, about ten in each series, 

 separated by nearly straight depressed septal lines. Aperture a small 

 median opening along the inner margin of the final segment. This 

 species is closely related to T. carinata but differs in not possessing the 

 marginal spines and irregularity and the sutures and is not quite so hm- 



bate. 



Some of the specimens assume irregular shapes and are more or less 



bent or deformed. 



Occmrence.— Calvert Formation. Plum Point, Chesapeake Beach. 

 Collection. — Maryland Geological Survey. 



Textularia gramen d'Orbigny. 

 Plate CXXXII, Figs. 8, 9. 



Textularia grnmen d'Orbigny, 18-16, Foram. Fossiles Vienne, p. 348, pi. xv, figs. 4-6. 

 Textularia fjramen Bagg, 1898, Bull. Amer. Pal., No. 10, p. 19. 



Description. — Test arenaceous, rough, stoutly built, laterally com- 

 pressed; margin subangular; five to seven wide chambers in each series; 

 very slightly convex; posterior end neatly rounded, general outline sim- 

 ilar to Textularia hauerii d'Orb. but distinguished from that species by 



