42 



SHOKTKR (^ONTPJBTTTTONS TO GENERAL GEOLOGY, 1!>19. 



Ij to 2 times as long as broad; annuli some- 

 wliat irregxilar in width, as is usual in the genus. 



The vertical section shows the piUars, which 

 are represented at the surface by the papillae, 

 and the narrow band of equatorial chambers. 



Type specimens from northeast side of Do- 

 mengine Creek, near corner of the SW. j sec. 

 29, T. 18 S., R. 15 E., Blount Diablo base and 

 meridian, Calif., in Meganos group (Eocene); 

 Dr. Bruce L. Clark, collector. 



Tliis may be the species referred to 0. 2>ratti 

 by Douvdle.^ His specimens were from the 

 peninsula of California. 



Orthophragmina pustulata Cushman. 



Plate VII, figure 6. 



Orthophragmina pustulata Cushman, Carnegie Inst. Wash- 

 ington Pub. 291, p. 55, pi. 9, figs. 6, 7; pi. 10, fig. 

 1, 1919. 



Test circular, lenticular, thickest in the 

 middle, thence gradually thinnmg toward the 

 periphery, which is ^vithout a carina or thinner 

 portion; thickness about one-fifth the diam- 

 eter; surface finely pustulose; papillae larger 

 and more numerous near the central region, 

 thence gradually decreasing in size and num- 

 ber toward the periphery. 



The vertical section shows the general form; 

 equatorial band very thin, increasing hardly at 

 all toward the periphery; pillars numerous, 

 somewhat thicker toward the surface. 



The horizontal section shows the equatorial 

 chambers elongate, rectangular, length about 

 three times the breadth; annuli irregular in 

 width; pillars irregularly rounded, remote, 

 largest in center, decreasing gradually in size 

 toward the periphery; intermediate space filled 

 with the irregularly polygonal lateral cham- 

 bers. 



Diameter 3.5 to 5 millimeters. 



Type specimen a section from station 3567, 

 lowermost 100 feet of Tertiary running m 

 above serpentine, northwest of Recreo, Matan- 

 zas Province, Cuba; A. C. Spencer, collector. 

 Specimens also apparently of this species were 

 obtained at station 344S, in limestone on 

 hillside south of Panupo manganese mme, 

 La Maya, near Santiago, Cuba; T. W. Vaughan, 

 collector. 



This is a larger, flatter species than 0. 

 cuhensis and is easily distinguished in the 

 sections. 



'Compt. Rend., vol. 161, p. 410, 1915. 



Orthophragmina crassa f'ushman. 



Plate VIII, figures ], 2. 



Orihophragmina crassa Cushman, Carnegie Inst. Wash- 

 ington Pub. 291, p. 53, pi. 9, figs. 4, 5: pi. 10, figs. 

 2, 4, 1919. 



Test circidar, lenticular, very thick in com- 

 parison with the diameter; central portion 

 broadly convex, thence straight or even 

 slightly concave to the rather acute periphery; 

 surface fairly smooth, with a few raised ends 

 of pillars making it slightly papillate. 



The vertical section shows the general 

 shape; in some specimens thickness at least 

 two- thirds the diameter; central portion 

 broadly rounded, with numerous large pillars, 

 increasing in diameter toward the surface; 

 lateral chambers very numerous, about three 

 times as wide as high; usually at least two 

 columns between each two adjacent pillars, 

 even in the center; over 30 chambers m the 

 center in some of the columns are indicated; 

 equatorial chambers increasing very slowly in 

 height toward the periphery but more rapidly 

 than in most species, so that the equatorial 

 band at the ])eriphery may be double the 

 width near the center; embryonic chamber 

 comparatively large, elongate in this section. 



The horizontal section shows the usual 

 elongate, rectangular equatorial chambers; the 

 pillars subpolygonal, largest in the center, 

 thence smaller toward the ])eriphery; inter- 

 mediate lateral chambers irreguhxrly polygonal. 



Diameter, 3.5 to 5.5 millimeters. 



Type specimen from station 6122, greensand 

 limestone, Boston manganese mme, Santiago 

 Province, Cuba; A. C. Spencer, collector. The 

 species also appears to be present at the 

 following stations: 



3475. Boston mine near Santiago, Cuba; A. C. Spencer, 

 collector. 



C117. Boulder from band of limestone on hill east of 

 railroad and south of Cristo, near* Santiago, Cuba; C. W. 

 Hayes, collector. 



6118. Fossil limestone near railroad, on trail to mines 

 south of Cristo, Cuba; C. ^^^ Hayes, collector. 



6119. Isabella and Boston manganese mine, Cuba: C. 

 W. Hayes, collector. 



6123. Ponupo manganese mine, resting on ore bed 4 to 

 6 feet thick, Santiago Province, Cuba; A. C. Spencer, 

 collector. 



6124. Foraminiferal limestone, Ponupo manganese 

 mine, Cuba; R. T. Hill, collector. 



6125. Railroad cut near San Nicolas manganese mine, 

 west of San Luis, Cuba; C. W. Hayes, collector. 



