54 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



Type specimen (U. S. N. M. No. 328186) from Boston manganese 

 mine, Santiago Province, Cuba. Besides the type station, according 

 to the sections obtained, the species evidently also occurs at the fol- 

 lowing stations: 6119, Isabella and Boston manganese mine, Santiago 

 Province, Cuba, collected by C. W. Hayes; 6123, Ponupo manganese 

 mine, Santiago Province, Cuba, resting or ore-bed 4 to 6 feet thick, 

 collected by A. C. Spencer; 6124, foraminiferal limestone, Ponupo 

 manganese mine, collected by T. R. Hill; 6125, railroad cut near San 

 Nicolas manganese mine, west of San Luis, Cuba, collected by C. W. 

 Hayes; 3475, Boston mine, near Santiago, Cuba, collected by A. C; 

 Spencer; 7666, from Sierra Guaso, northeast of Guantanamo, Cuba, 

 collected by N. H. Darton. 



This species is very close to 0. taramellei Munier-Chalmas, but is 

 decidedly smaller, all the species seen from Cuba being less than 2 mm. 

 in diameter between the tips of the arms. 



The specimens from station 6120 are weathered out and are numer- 

 ous, greenish in color. 



0. taramellei was described from Villa Lady Bruce (Biarritz) ; Monte 

 Spilecco (Vicentin) ; Schonegg, near Kressenburg. 



Orthophragmina sculpturata, new species. 

 (Plate 9, Figures 8, 9.) 



The following is a description of this species : 



Test circular, somewhat sellseform, often very slightly so; central portion 

 considerably thickened and occupying one-third to one-fourth the diameter 

 of the test; peripheral portion much flattened and comparatively thin; exterior 

 of central thickened portion, when well preserved, beautifully sculptured, 

 with comparatively few raised papillae, between which the surface is depressed 

 and reticulated as in 0. marthce Schlumberger; peripheral thin portion of the 

 test usually smooth when the surface is well preserved. 



Vertical sections show thickening up to 1.5 mm. in the central portion, 

 while the periphery is often but 0.25 mm. in thickness. Equatorial chambers 

 small, increasing hardly at all in diameter from the center to the periphery, 

 central embryonic chambers not well shown in the sections, but at least 6 to 8 

 times the diameter of adjacent equatorial chambers. Peripheral portion 

 without pillars, central portion with very strong pillars, thick, with a diameter 

 one-third to one-half their length and increasing very slightly in diameter 

 toward the surface; lateral chambers in columns between the pillars very thin 

 compared to their breadth. Central portion of the outline decidedly undulate 

 from the projecting ends of the pillars. 



Horizontal sections show very numerous equatorial chambers, elongate, 

 several times as long as broad; lateral chambers in section appearing as 

 polygonal lighter spaces surrounding in a single row the solid, opaque, circular, 

 elliptical, or irregularly polygonal pillar sections, toward the periphery, where 

 the pillars are wanting, forming an irregular network somewhat similar to the 

 arrangement in 0. dispansa Sowerby (Bull. Soc. Geol. France, ser. 4, vol. 3, 

 plate 12, fig. 51). 



Diameter 5 to 7 mm. 



