AMERICAN SPECIES OF ORTHOPHRAGMINA AND LEPIDOCYCLINA. 



45 



Orthophragmina georgiana Cushman. 



Plate X, figure 1. 



Orthophragmina georgiana Cushman, U. S. Geol. Survey 

 Prof. Paper 108, p. 117, pi. 41, figs. 2, 3; pi. 42, fig. 

 3; pi. 43, figs. 2, 3, 1917. 



Test typically almost square, the angles 

 slightly projecting and the sides slightly con- 

 cave near the angles, convex in the center, 

 small; diameter usually about 6 millimeters 

 for adult specimens; diagonals of the square 

 occupied by raised radial areas with a central 

 umbonate mass a little more than a milli- 

 meter in diameter; intermediate triangular 

 areas thin and flat; entire surface with very 

 numerous, evenly distributed, prominent papil- 

 lae, those of the central umbo and the middle 

 line of the radial ridges slightly larger than 

 those of the rest of the surface. 



The horizontal section shows the equatorial 

 chambers elongate, rectangular, those of the 

 radial portions more crowded than those of the 

 intermediate flattened areas. 



In vertical section the lateral chambers 

 are most numerous over the radial and um- 

 bonal regions. 



The type locality for this species is station 

 3387, Ocala limestone at Red Bluff, on Flint 

 River 7 miles above Bainbridge, Decatur 

 Coimty, Ga.; T. W. Vaughan, collector. It 

 was recorded also from several stations along 

 Flint River in Georgia and from station 7348, 

 on left bank of Suwannee River about a mile 

 above Troy Springs, Fla. ; C. W. Cooke, 

 collector. 



Additional records include stations in Geor- 

 gia, Florida, and Alabama, as follows : 



3758. Camp Perry, Fla.; S. W. McCallie, collector; a 

 few specimens. 



3760. On Georgia Southern & Florida Railway half a 

 mile south of Tivola, Ga.; S. W. McCallie, collector. 



6161. Flint River, Bainbridge, Ga. ; L.W.Stephenson, 

 collector. 



6747. Steamboat Point, on west side of Sepulga River 

 at sharp bend near middle of sec. 20, T. 3 N., R. 13 E., 

 Escambia County, Ala.; C. W. Cooke, collector; speci- 

 mens fairly common with other Ocala limestone species. 



6785. Atlantic Coast Line Railroad at Button's phos- 

 phate spur, one-half to three-fourths mile south of Herlong's 

 Station, Columbia County, Fla.;T. W. Vaughan and C. W. 

 Cooke, collectors; specimens rare but typical. 



7127. East bank of Flint River, one-fourth mile below 

 Norman's Ferry, Mitchell County, Ga.; loose blocks 

 excavated from channel; C. W. Cooke, and J. E. Brantly, 

 collectors. 



8259. About 6 miles southeast of Campbellton and 12 

 miles northwest of Marianna, on road to Cottonwood, Ala.: 

 half a mile from its intersection with the Marianna- 

 Campbellton road, Jackson County, Fla.; C. W. Cooke, 

 collector. 



A single specimen of this species was found 

 at station 6408, in the Brito formation on the 

 Pacific coast of Nicaragua, 2 miles northwest 

 of Brito Harbor; C. W. Hayes, collector. 

 This occurs with two other Georgia species, as 

 noted under O.Jlintensis. 



Orthophragmina subtaramellei Cushman. 



Plate X, figures 2, 3. 



Orthophragmina subtaramellei Cushman, Carnegie Inst. 

 Washington Pub. 291, p. 53, pi. 10, fig. 2; pi. 15, 

 figs. 1-3, 1919. 



Test stellate, usually with five arms, oc- 

 casionally six; arms well distinguished from 

 the central body and extending outward 

 freely, thickest in the central region, thence 

 gradually sloping to the angles between the 

 arms and gradually merging into the median 

 axis of the arms; the arms themselves thickest 

 in the middle, thence sloping to the sides, 

 which are thin and angled; ends of the arms 

 round-pointed; surface with numerous granu- 

 lations, more pronounced in the central portion. 



Vertical sections show the general shape, 

 the equatorial band of chambers increasing 

 slightly if at all from the center to the periph- 

 ery, pillars well developed, especiaUy in the 

 central region, but not numerous, usually 

 several columns of lateral chambers between 

 them. 



Diameter, 1.5 to 2 miUimeters. 



The type locality for this species is station 

 6122, greensand limestone, Boston manganese 

 mine, Santiago Province, Cuba. According 

 to the sections obtained, the species evidently 

 also occurs at the following stations: 



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

 collector. 



6119. Isabella and Boston manganese mine, Santiago 

 Province, Cuba; C. W. Hayes, collector. 



6123 . Ponupo manganese mine, Santiago Province , Cuba , 

 resting on ore bed 4 to 6 feet thick; A. C. Spencer, col- 

 lector. 



6124. Foraminiferal limestone, Ponupo manganese 

 mine; R. T. Hill, collector. 



6125. Railroad cut near San Nicolas manganese mine, 

 west of San Luis, Cuba; C. W. Ha,yes, collector. 



7666. Sierra Guaso, northeast of Guantanamo, Cuba; 

 N. H. Barton, collector. 



