AMERICAN SPECIES OF ORTHOPHRAGMINA AND LEPIDOCYCLINA. 



69 



Vertical sections show apparently an entire 

 absence of pillars throughout ; equatorial cham- 

 bers nearly square in section, walls straight; 

 lateral chambers very numerous, low and broad, 

 very thin-walled, 12 to 15 in a vertical column 

 in the thicker portions of the test. 



Horizontal sections show typical hexagonal 

 equatorial chambers. 



Diameter as much as 25 millimeters or more. 



Type material (U. S. N. M. No. 328198) 

 from Antigua, Leeward Islands, U. S. G. S. 

 station 6869, Long Island, T. W. Vaughan, 

 collector. The species is very abundant in 

 this material, making up a large proportion 

 of the rock mass. Specimens are associated 

 with Heterostegina. 



This may be distinguished from other species 

 of Lepidocyclina by its saddle-shaped test, 

 the flat, nonumbonate center, the finely 

 netted surface in worn specimens, and the 

 absence of pillars in the vertical section, with 

 the thin- walled chambers. 



Lepidocyclina schlumbergeri Lemoine and R. Douvillg. 



Lepidoq/clina schlumbergeri Lemoine and R. Douville, 

 Soc. geol. France, Paleontologie, vol. 12, Mem. 32, 

 p. 14, pi. 1, fig. 10; pi. 2, fig. 6, 1904. 

 Cushman, Carnegie Inst. WasMngton Pub. 291, p. 

 57, 1919 



Test large, compressed, lenticular, thickest 

 in the central region, from which it gradually 

 thins out toward the periphery, somewhat 

 flexuous and slightly saddle-shaped; surface 

 fairly smooth or somewhat finely granular, the 

 granules representing the ends of the small 

 pillars; surface often uneven, owing to the 

 raised peripheral waUs of the lateral chambers. 



The vertical section shows the general shape, 

 thin, gently curving from the center to the 

 periphery, slightly curved ; the piUars numerous 

 and comparatively small, a very few larger 

 pillars in the central region; vertical colimins 

 of lateral chambers with numerous low, flat- 

 tened chambers making up each column. 



The horizontal section shows hexagonal 

 chambers, but more numerous equatorial ones 

 with the outer wall convexly cxirved, walls 

 rather thick. 



Diameter, 25 to 35 millimeters. 



Lemoine and R. Douville regard this as a 

 mutation of L. dilatata. They record this spe- 

 cies especially from Spain at four localities. 

 In Cuba it has been found at stations 7512, 

 Ocujal; 7518, south side of Los Melones Moun- 



tain near west end; 7522, Mogote Peak; 7543, 

 limestone outcrop, east side of Yateras River; 

 7664, north slope of La Piedra, northeast of 

 Jamaica, northeast of Guantanamo, collected 

 by INT. H. Darton. 



Lepidocyclina pseudomarginata Cushman, n. sp. 



Plate XXVI, figures 2-4. 



Test of medimn size, 12 to 15 millimeters in 

 diameter, slightly sellaeform; central portion 

 thickened and occupying nearly half the dia- 

 meter of the entire test, entire thickness about 

 one-fourth the whole diameter of the test; 

 peripheral portion thin; central thickened por- 

 tion strongly papillate from the projecting 

 ends of the pillars, which gradually decrease 

 in number as the thinner peripheral portion is 

 approached; line of demarcation not abrupt; 

 papillae of the central portion very numerous 

 and rather evenly distributed. 



Equatorial chambers hexagonal, showing at 

 the surface only on the extreme periphery; 

 the remainder of the thin portion toward the 

 center covered with one or more layers of 

 lateral chambers. 



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

 3683, Archer, Fla.; W. H. Dall, collector. 

 A very small specimen (U. S, N". M. No. 136425) 

 may be the young of this species. It is from 

 Johnson's sink. Levy County, Fla.; L. C. 

 Johnson, collector. Other specimens were 

 obtaiaed at the following stations: 



7194. Ocala limestone, Marianaa, Fla. ; bed 4 of section, 

 at mouth, of cavern; C. W. Cooke and W. C. Mansfield, 

 collectors. 



7338. Suwannee River at Bowling Springs, Suwannee 

 County, Fla.; C. W. Cooke, collector. 



This species resembles L. marginata, but the 

 central region is much more finely papillate, 

 the number of papillae being double that in 

 L. marginata. It seems to be a rare species 

 in the Ocala limestone. 



Lepidocyclina supera (Conrad) H. Douville. 



Plate XXVI, figures 5-7. 



Orbitolites supera Conrad, Acad. Nat. Sci. Philadelphia, 



Proc, No. 2, p. 74, 1865. 

 Orbitoides supera Conrad, Am. Jour. Sci., 2d ser., vol. 43, 



p. 31, 1867.' 

 Lepidoq/clina supera (Conrad) H. Douville, Compt. Rend., 



1918, pp. 263, 264, figs. 6-8, 11. 



Test flattened or slightly sellaeform, typically 

 circular in outline but occasionally irregular. 



