FOSSIL FORAMINIFERA FROM THE WEST INDIES. 



59 



FIG. 7. Lepidocydina. morgani Le- 

 moine and R. Douville. Embryonic 

 chambers. X 35. Specimen from 

 station 7543, limestone outcrop, 

 east side of Yateras, Cuba. 



Lepidocydina morgani Lemoine and R. Douville. 

 (Plate 11, Figures 1 to 3; Text-fig. 7.) 



Lepidocydina cf. marginata H. Douville, Soc. Geol. France Bull., ser. 3, vol. 18, p. 1001, 1900. 

 Lepidocydina morgani Lemoine and R. Douville, Soc. Geol. France, Paleont., vol. 12, Mem. 

 32, p. 17, plate 1, figs. 12, 15, 17; plate 2, figs. 4, 12; plate 3, fig. 2; 1904. 



The following is a description of this 

 species : 



Test small, discoidal, much thickened in 

 the central portion, from which it tapers 

 rather rapidly to the subacute periphery; 

 central protuberant portion with a series of 

 large pustules ranging from 5 to 12 or more in 

 number, of which one is usually central, 

 surface reticulate between the pustules; the 

 margins stellate; periphery of the test thin 

 and slightly reticulated by the walls of the 

 equatorial chambers. 



Vertical sections show the general form 

 and curvature of the surface of the test, the 

 few pillars in the central region rapidly in- 

 creasing in diameter toward the surface of 

 the test; lateral chambers with the outer wall convex, averaging about three 

 times as wide as high ; in the central region with as many as 10 chambers in the 

 vertical columns; equatorial chambers not increasing rapidly in height; height 

 of those at the periphery not more than double that of those near the center. 



Horizontal sections show the embryonic chambers, which are unequal, the 

 larger one partially surrounding the smaller, as in the subgenus Nephrolepidina 

 of H. Douville and the equatorial chambers more or less diamond-shaped, as 

 in that subgenus. In other specimens the outer wall of the chamber is convex. 



Diameter 2 to 5 mm. 



Distribution. Specimens seemingly identical with this species were 

 found at the following stations in Cuba: 7513, limestone, outcrop where 

 Palmer Trail joins Ocujal Trail; 7516, west end, Los Melones Moun- 

 tain; 7543, limestone outcrop, east side of Yateras; 7554, south of El 

 Jigue, 5 miles above mouth of Yateras River on west side, collected 

 by O. E. Meinzer. Specimens, the sections of which are imperfect, but 

 probably belonging to L. morgani, were obtained by O. E. Meinzer at 

 station 7519, limestone from drift near top of landslide next north of 

 Los Melones. and 7522, Mogote Peak. The specimens whose exteriors 

 are figured were obtained by N. H. Darton at station 7664, north slope, 

 La Piedra, northeast of Jamaica, northeast of Guantanamo, Cuba. 



Lemoine and R. Douville record this species from four localities in 

 Aquitaine (Abesse, Mimbaste, Saint-Etienne-d'Orthe, and Le Man- 

 dillot), from four localities in Spain (Baena, Pont du Guadalquiver, 

 Sella, and Penaguila), and from Madagascar. The stage is indicated 

 as Aquitanian but not definitely given. 



It is a very distinctive species, and the Cuban specimens seem to differ 

 in no essential characters from those figured by Lemoine and Douville. 



