4 PROCEEDINGS OF THE NATIONAL MUSEUM vou 71 



LEPID«CYCLINA (LEPIDOCYCUNA) SUPERA (Conrad) H. DouvillS 



Plate 3, fig. 3 



1920. Lepidocyclina supera Cushman, U. S. Geol. Survey Prof. Pap. 125, p. 69, 



pi. 26, figs. 5-7 (references to previous literature). 

 1924. Isolepidina supera H. DouviLLi, Soc. Geol. France, mem. n. s., vol. 1, 



m6m. 2, p. 40, pl.l, figs. 9, 10, text-figs. 23-26. 

 1924. Lepidocyclina (Lepidocyclina) supera Vaughan, Geol. Soc. Amer. Bull., 



vol. 35, pp. 797, 819, pi. 33, fig. 3. 



The external features, the embryonic chambecs, and the equatorial 

 chambers of L. supera have been very well figured but no good illus- 

 tration of a vertical section has hitherto been published. Therefore, 

 such a section of microspheric specimen is given on plate 3, fig. 3. 

 The test is smaller than that of L. mantelli and is more lenticular in 

 form. The lateral chambers are low and are decidedly irregular in 

 shape and size; the walls between successive layers vary greatly in 

 thickness. Pillars are well developed. 



Geologic Tiorizon. — Byram marl, uppermost Oligocene, of Mississippi 

 and Alabama; Glendon formation in Alabama and probably in Mis- 

 sissippi. 



lepidocyclina (LEPIDOCYCLINA) MIRAFLORENSIS Vaughan 



Plate 4, figs. 3-5 



1919. Lepidocyclina vaughani (part) Cushman, U. S. Nat. Mus.-Bull. 103, p. 93, 

 pi. 37, figs. 1, 2, 3, and 5 (not pi. 37, fig. 4, nor pi. 38). 



1923. Lopidocyclina miraflorensis Vaughan, Nat. Acad. Sci. Proc, vol. 9, p. 257. 



1924. Lepidocyclina {Lepidocyclina) miraflorensis Vaughan, Geol. Soc. Amer. 



Bull., vol. 35, p. 797. 



Since no adequate illustration of the equatorial chambers of this 

 species has yet been published, that deficiency is here supplied; and 

 figures of vertical sections are presented for purposes of comparison 

 with the other species discussed in this paper. Lepidocyclina mira- 

 florensis and L.forresti are closely related, but they are distinguished 

 by important differences. . In L. miraflorensis the central part of the 

 test is more domed and the equatorial chambers increase more rapidly 

 in height from the center toward the periphery than in L. jorresti. 

 In L. jorresti the test is relatively more compressed and the diameter 

 is greater. 



Locality and geologic horizon. — The cotypes of L. miraflorensis were 

 collected by Dr. D. F, MacDonald on the wagon road one-half mile 

 south of Miraflores Station, Panama Canal Zone, U. S. G. S. locality 

 No. 6255. The horizon is supposed to be the lower Miocene, Empe- 

 rador limestone, but the stratigraphic position is not definitely known. 



