NO. 4 FORAMINIFERA CUSHMAN 2^ 



Genus TROCHAMMINOIDES Cushman, 1910 



Plate 3, fig. 7 



Test free, typically planospiral, composed of several coils, each 

 constricted into a number of chamber-like portions with the openings 

 between large ; wall of fine sand and a yellowish-brown cement ; aper- 

 ture simple at the end of the last-formed chamber. 



Genus HAPLOPHRAGMOIDES Cushman, 19 10 



Plate 3, fig. 8 



Test free, planospiral, composed of several coils, each composed 

 of a number of chambers ; wall arenaceous, varying much in texture 

 and in the relative amount of cement in the different species ; aperture 

 at the ventral border or on the lower portion of the apertural face of 

 the chamber. 



Genus CRIBROSTOMOIDES Cushman, 1910 

 Plate 4, fig. I 



Test free, planospiral, composed of numerous chambers in several 

 coils, the last-formed coil with several chambers progressively increas- 

 ing in size ; wall arenaceous, with much cement usually of a light 

 brown color ; aperture in young specimens a simple elongate slit at 

 the base of the apertural face, later subdivided by tooth-like proc- 

 esses, and in the adult represented by a linear series of distinct 

 rounded openings. 



Genus CYCLAMMINA H. B. Brady, 1876 

 Plate 3, fig. 9 



Test free, planospiral, composed of numerous chambers in a close- 

 coiled involute series, final volution usually embracing the preceding 

 ones except at the umbilicus ; walls thick, composed of fine arenaceous 

 material with a large amount of reddish-brown cement, exterior 

 smooth ; chambers with secondary labyrinthic structures interiorly, 

 especially on the peripheral portion of each chamber, early chambers 

 often becoming completely filled by this secondary growth ; aperture 

 a curved fissure at the proximal portion of the apertural face, supple- 

 mented by numerous pores in the central portion of the apertural wall. 



Genus LOFTUSIA Carpenter and Brady, 1869 



Test of large size, spiral ; elongated in the direction of the axis ; 

 fusiform or elliptical ; resembling AlvcoVma in contour. 



