66 



SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY, 1919. 



Lepidocyclina favosa Cushman. 



Plate XV, figure 5 (B). 



Lepidoqjclina favosa Cushman, Carnegie Inst. Washington 

 Pub. 291, p. 66, pi. 3, figs. 1, 2b; pi. 15, fig. 4, 1919. 



Test of medium size, compressed, strongly 

 undulate or saddle-shaped; the central portion 

 umbonate, much curved, thick; the remainder 

 of the test thin and flangelike ; central umbonate 

 mass with an ornamentation of polygonal areas 

 caused by rounded raised ribs; remainder of 

 the test fairly smooth, but in most specimens 

 irregularly eroded. 



The vertical section shows numerous distinct 

 pillars in the umbonate region, broad at the 

 exterior and narrowing to a point near the equa- 

 torial chambers; flattened peripheral portion 

 with few indistinct pillars. 



Diameter, 15 to 18 millimeters for typical 

 specimens. 



The type locality for this species is U. S. 

 G. S. station 6881, Antigua, Leeward Islands, 

 bluffs on north side of Willoughby Bay. 



This is a very strikingly ornamented species 

 and hardly likely to be mistaken for any other, 

 especially with its very strong saddle shape in 

 addition. It was not seen in any other mate- 

 rial from the Antigua formation but is very 

 abundant at this station, as the photograph 

 (PI. XV, fig. 5) will show. 



Lepidocyclina pseudocarinata Cushman, n. sp. 



Plate XXIV, figures 3, 4. 



Test of medium size, 18 millimeters in diame- 

 ter in the largest specimen, generally without 

 sellaeform curves; central portion thickened 

 but only slightly convex; the thickened portion 

 occupying about two-tliirds of the surface of 

 the test; peripheral portion flattened and thin, 

 the change from the thickened center abruptly 

 marked; surface smooth except for scrobicu- 

 lations due to the erosion of the surface. 



The horizontal section shows the equatorial 

 band of chambers hexagonal. 



The vertical section shows the equatorial 

 band of chambers increasing gradually in size 

 toward the periphery, where the height is 

 three to four times the width; walls tliick, very 

 slightly convex; lateral chambers numerous in 

 the central portion, rapidly diminishing in 

 numbers at the point where the abrupt change 

 occurs from the central thickening to the tliin 

 periphery; outer sui-face curved; inner surface 

 flattened, not greatly compressed; lateral 



chambers over the peripheral carina usually 

 wanting; the entire border almost completely 

 formed by the equatorial band. 



Type specimen from U. S. G. S. collection 

 6810, Ocala limestone, Cummer Lumber Co.'s 

 phosphate plant No. 10, 1 mile northwest of 

 Newberry, Fla. ; C. W. Cooke, collector. It was 

 also found at the following stations in Florida: 



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



6790. 300 feet south of the Alachua Manufacturing Co.'s 

 plant at south edge of Alachua, Fla. ; II. Gunter and C. W. 

 Cooke, collectors. 



6812. Cummer Liunber Co.'s phosphate plant No. 6, 

 IJ miles south of Newben-y; C. W. Cooke, collector. 



6814. Quarry of Franklin Phosphate Co., 1^ miles 

 northwest of Newberry, Alachua County; C. W. Cooke, 

 collector. 



7194. Ocala limestone, 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. Mans- 

 field, collectors. 



7341. Left bank of Suwannee River at Branford, Suwan- 

 nee County; C. W. Cooke, collector. 



7349. Left bank of Suwannee River about half a mile 

 below Fort McComb; C. W. Cooke, collector. 



7367. Willow Sink, IJ to 2 miles west of Chiefland, 

 Levy County; C. W. Cooke, collector. 



In Georgia specimens from two localities 

 appear to be identical with this: 



6160. Flint River north of Blue Spring, 4 miles below 

 Bainbridge; L. W. Stephenson, collector. 



7097. East bank of Flint River above old factory at 

 bend three-quarters of a mile northeast of Atlantic Coast 

 Line Railroad station at Bainbridge; C. W. Cooke and 

 W. C. Mansfield, collectors. 



This species naay be distinguished from 

 most of the other species of the Ocala lime- 

 stone by its carinate appearance and from the 

 only other species of the same formation that 

 has this same character, L. cookei, by its 

 smooth or irregularly scrobiculate surface 

 when eroded, as contrasted with the very 

 papillate sm"face of L. cool-ei. It will probably 

 be found to have a wider geographic range 

 than is here indicated, but it is not a common 

 species in comparison with L. ocalana or L. 

 floridana, with which it is associated. 



Lepidocyclina cookei Cushman, n. sp. 



Plate XXIV, figures 5, 6. 



Test rather small, 10 millimeters in diameter 

 in the largest specimen, thick, very convex in 

 the central portion, at the periphery extending 

 out into a thin border, the transition rather 

 sharply marked; surface very strongly papil- 



