52 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



Cribrostovioiden bradyi — material rxcmined. 



Genus CYCLAMMINA H. B. Brady, 1876. 



Litaolu W. B. Carpenter (part). The Microscope, ed. 5, 1875, p. 536. — Carter, 



Aun. Mag. Nat. Hist., ser. 4, vol. 19, 1877, p. 203. 

 Oyclammma H. B. Brady fMS.) in Norman. Proc. Roy. Soc, vol. 25, 1876. p. 214 



(Type, Cyclammina caricellala H.B.Brady); Rep. Voy. Challenger. Zoology, 



vol.9, 1884, p. S^.O. — Chapman, The Foraminifera, 1902, p. 158. — Cushman, 



Bull. 71, U. S. Nat. JMus., pt. 1. 1910, p. 109. 



Descriytwn. — Test free, planospiral, composed of numerous cham- 

 bers in a close-coiled nautiloid series, final volution usually em- 

 bracing' the preceding ones except at the umbilicus; walls thick, com- 

 posed of fine arenaceous material with a large amount of reddish-brown 

 cement, exterior smooth, chambers with secondary labyrinthic struc- 

 tures 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 aper- 

 tural face, supplemented by numerous pores in the central portion of 

 the apertural wall. 



