. Carnegie Institution of Washington publication. . FIG. 8.—Sections of embryonic chambers of Lepidocyclina crassata, new species, showing variation in position of two or more divisions, and the comparatively thick outer wall. X 25. Specimens from limestone from drift near top of landslide next north of Los Melones, Cuba. Type specimen, section (U. S. N. M. No. 328192) from station 7513, orbitoidal limestone, outcrop where Palmer Trail joins Ocujal Trail, Cuba. Specimens are also numerous in material from 7512, Ocujal; 7519, orbitoidal limestone, from drift near top of landslide next north of


. Carnegie Institution of Washington publication. . FIG. 8.—Sections of embryonic chambers of Lepidocyclina crassata, new species, showing variation in position of two or more divisions, and the comparatively thick outer wall. X 25. Specimens from limestone from drift near top of landslide next north of Los Melones, Cuba. Type specimen, section (U. S. N. M. No. 328192) from station 7513, orbitoidal limestone, outcrop where Palmer Trail joins Ocujal Trail, Cuba. Specimens are also numerous in material from 7512, Ocujal; 7519, orbitoidal limestone, from drift near top of landslide next north of Los Melones; 7521, limestone, top of Mogote Peak, Cuba. All the specimens were collected by 0. E. Meinzer. L. crassata is very heavy and thick-walled and in section may be easily distinguished from any other Cuban or West Indian species of Lepidocyclina. Lepidocyclina subraulinii, new species. (Plate 11, Figures 6, 7; Plate 12, Figures 5, 6.) The following is a description of this species: Test circular, much thickened in the central portion, which occupies about one-third the diameter of the test; peripheral portion much flattened, thin; thick central portion irregularly papillate, peripheral portion smooth, showing almost no tendency to become saddle-shaped. Vertical section shows the general thickness, the central lenticular body, and the thin periphery; central portion with very numerous pillars, increasing in diameter toward the surface; lateral chambers crowded between the pillars, very numerous in the vertical columns and much wider than high; equatorial chambers increasing in diameter toward the periphery, the outer margin convex and with a series of fine pores. Horizontal section shows the equatorial chambers, which are polygonal; the outer margin strongly convex; pillars subpolygonal, with the lateral chambers making irregular polygonal meshes between them, toward the periphery the lateral chambers making up the entire test as the pillars decrease in number. Diamete


Size: 2203px × 1134px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthorcarnegie, bookcentury1900, bookdecade1900, bookyear1902