AMERICAN SPECIES OF OETHOPHEAGMINA AND LEPIDOCYCLINA. 



67 



late over the whole central portion; the thin 

 jieriphery smooth except for erosion and the 

 reticulate markings formed, by the walls of the 

 equatorial chambers. 



Sections were not made, as the species 

 seems to be very rare, but accidental breaks 

 show that the equatorial chambers are hex- 

 agonal and of uniform size, the height in- 

 creasing as usual toward the periphery but 

 not excessively so; lateral chambers wanting 

 over the thin periphery; numerous pillars are 

 indicated by the closely set papillae of the 

 surface of the thickened central portion. 



Tj^pe specimen from U. S. G. S. station 

 6812, Ocala limestone. Cu m mer Lumber Co.'s 

 phosphate plant No. 6, IJ miles south of 

 Newberry, Fla. ; C. W. Cooke, collector. The 

 only other specimen known is from station 

 4965, half a mile southwest of Fort White, 

 Fla.; G. C. Matson, collector. 



From the available material the species 

 seems to be rare in the Ocala limestone, but 

 probably it has a wider range than is indicated 

 by these records. 



Lepidocyclina attenuata Cushman, n. sp. 



Plate XXIV, figures 7, 8. 



Test of medium size, in all specimens ex- 

 amined close to 12 millimeters in diameter, 

 plane or slightly sellaeform; central portion 

 strongly umbonate, the thickened portion 

 occupying about one-fourth the diameter; 

 remainder of the test thin; central portion 

 finely papillate; peripheral portion smooth or 

 scrobiculate where eroded. Chambers of the 

 equatorial zone hexagonal. 



The vertical section shows the equatorial 

 chambers low in the central portion and in- 

 creasing rapidly in height toward the pe- 

 riphery until at the edge they are three to fom' 

 times as high as broad, outer wall convex; 

 lateral chambers very numerous in the thick- 

 ened umbonal region, where there are 20 to 

 25 chambers in a vertical column, rapidly de- 

 creasing in numbers as the edge of the umbo is 

 reached, thence gradually reduced toward the 

 periphery, chambers low and broad, several 

 times as wide as high; walls comparatively 

 thin; pillars numerous, slender, increasing 

 gradually in diameter toward the surface. 



Thickness of umbonal region 3 millimeters 

 in a test 12 to 13 millimeters in diameter. 



Type specimen from U. S. G. S. station 6814, 

 quarry of Franklin Phosphate Co., 1^ miles 

 northwest of Newberry, Alachua County, 

 Fla.; C. W. Cooke, collector. 



Other Florida specimens were obtained at 

 the following stations: 



4974. Six miles southwest of Chipley, on west side of 

 St. Andrews Bay road; G. C. Matson, collector. 



5031. Ocala, Marion County; G. C. Matson, collector. 



6824. East bank of Suwannee River at Seaboard Air 

 Line Railway bridge opposite EUaville, Fla., bed 1 of 

 section; C. W. Cooke, collector. 



7194. Mouth of cavern about 200 yards southwest of 

 wagon bridge over Chipola River east of Marianna; bed 4 

 of section; C. W. Cooke and W. C. Mansfield, collectors. 



7199. Contact of beds 4 and 5 of same section- W. C. 

 Mansfield, collector. 



7348. Left bank of Suwannee River about 1 mile above 

 Troy Springs; C. W. Cooke, collector. 



U. S. N. M. No. 112507, Richards quarry, Ocala. 



It is apparently present in Georgia at station 

 3380, base of bluff at Little Horseshoe Bend, 

 just below mouth of Blue or Russell Spring, 

 Flint River, 4 miles below Bainbridge, Decatur 

 County; T. W. Vaughan, collector. 



It may be distinguished from the other 

 species of the Ocala limestone by the promi- 

 nent umbonate portion, occupying but a 

 quarter of the diameter of the test, and the 

 large proportion of flattened periphery. 



Lepidocyclina floridana Cushman, n. sp. 



Plate XXV, figures 1, 2. 



Test small, thin, very sellaeform; usual size 

 of specimens from 4 to 8 millimeters in diam- 

 eter; sellaeform condition very regular, the 

 bending of the test being somewhat greater in 

 measurement than half the diameter of the 

 test. In a specimen measuring 7 millimeters 

 in diameter the entire deviation from, the plane 

 through the center is as much as 4 millimeters; 

 surface appearing smooth to the unaided eye 

 but with slight magnification shown to be 

 finely papillate from the projection of the ends 

 of the vertical piUars, especially in the central 

 part of the test but more or less so over the 

 whole test. 



The horizontal section shows the chambers 

 of the equatorial band with the characteristic 

 hexagonal shape, those near the periphery with 

 the outer border convexly curved, annuli 

 irregular. 



The vertical section shows the chambers of 

 the equatorial band in the central part square 

 in section, the height about equaling the width 



