60 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



Lepidocyclina marginata (Michelotti). 

 (Plate 12, Figures 1, 2.) 



Nummulites marginata Michelotti, Soc. Ital. Sci. Mem., vol. 22, p. 297, plate 3, fig. 4, 1841. 



Lepidocyclina marginata Lemoine and R. Douville, Soc. Geol. France, Paleont., vol. 12, 



Mem. 32, p. 16, plate 1, fig. 7; plate 2, figs. 7, 9, 11, 20; plate 3, figs. 3, 8, 9, 13; 1904. 



The following is a description of this species : 



Test of small or medium size, lenticular, thickest in the central region, thence 

 tapering gradually to the periphery, which in the adult forms a thin flange 

 around the thicker central portion; central portion with numerous prominent 

 pustules, rather evenly placed and of good size, representing the outer end of 

 the pillars; flange smooth, except for roughness caused by weathering. 



Vertical section shows the general shape already noted, the numerous pillars 

 giving an undulate outline to the central thickened region, pillars rather 

 crowded at the center, but separating toward the periphery, increasing very 

 rapidly in diameter in the first quarter or third of their length, thence keeping 

 about the same diameter to the surface; lateral chambers in single columns 

 between the pillars, equatorial band of chambers rather narrow and thin, 

 increasing in height toward the periphery. 



Horizontal section shows the equatorial chambers to be in general hexagonal, 

 occasionally with the peripheral portion conyexly curved; the lateral chambers 

 also hexagonal, especially in the central region, where they are compressed by 

 the pillars. 



Diameter up to 12 or 15 mm., usually less. 



Distribution. Lemoine and R. Douville" record this species from 

 Rosignano, Montferrat, Pie'mont, and Colli Torinesi, Turin, Italy, 

 and from Pont du Guadalquiver and Bae"na, Andalusia, Spain, stage 

 not given. It was collected at the following stations in Cuba by O. E. 

 Meinzer: 7512, Ocujal; 7513 ?, orbitoidal limestone, outcrop where 

 Palmer Trail joins Ocujal Trail; 7518, south side near west end, Los 

 Melones Mountain; 7519, orbitoidal limestone, from drift near top of 

 landslide next north of Los Melones; 7521, limestone, top of Mogote 

 Peak; 7522 ?, Mogote Peak; 7543, limestone outcrop, east side of 

 Yateras; and by N. H. Darton at station 7664, north slope of La Piedra, 

 northeast of Jamaica, northeast of Guantdnamo. 



Lemoine and R. Douville* had only the microspheric form of the 

 species, but the Cuban material has megalospheric specimens. The 

 embryonic chambers are rather thick-walled and unequal in size. 



Lepidocyclina sumatrensis (H. B. Brady). 

 (Plate 12, Figures 3, 4.) 



Orbitoides sumatrensis H. B. Brady, Geol. Mag., ser. 2. vol. 2, p. 536, plate 14, fig. 3, 1875; 

 Jaarb. Mijn. Ned.-Oost.-Indie, vol. 7, pt. 2, p. 165, plate 2, fig. 3, 1878; Newton and 

 Holland, Ann. Mag. Nat. Hist., ser. 7, vol. 3, p. 259, plate 10, figs. 7 to 12, 1899. 



Lepidocyclina sumatrensis Jones and Chapman, in Andrews, A Monograph of Christmas 

 Island, London, p. 244, plate 20, fig. 6, 1900; Newton and Holland, Journ. Coll. 

 of Sci., Imp. Univ. Tokyo, vol. 27, art. 6, p. 11, plate 1, fig. 7, 1903; Lemoine 

 and R. Douville, Soc. geol. France, Paleont., vol. 12, Mem. 32, p. 18, plate 1, fig. 

 14; plate 2, fig. 15; plate 3, fig. 6; 1904. 



The following is a description of this species: 



Test small, discoidal, thickened in the central portion, from which it tapers 

 gradually to the subacute periphery, central protuberant portion more or less 



