NO. lO AMERICAN SPECIES OF LEPIDOCYCLINA VAUGHAN 35 



layers on each side of the center, a little less than half as many at the 

 periphery. Pillars irregular in development ; some become very much 

 thickened and form the papillae already mentioned. 



Locality and geologic horizon. — North slope of La Piedra, north- 

 east of Jamaica, near Guantanamo, Cuba, U.S.G.S. locality no. 7664, 

 collected by N. H. Darton. Oligocene, probably upper. 



Although this species is based on a single vertical section, so many 

 features can be made out that, except ascertaining the shape of 

 equatorial chambers in a horizontal section, its specific characterization 

 is virtually complete. 



LEPIDOCYCLINA (NEPHROLEPIDINA) sp. cf. L. VERBEEKI 

 Newton and Holland 



Plate 23, fig. II 



1932. Lcpldocyclina verbccki Barker, Geol. Mag., vol. 69, p. 278, pi. 16, figs. 1-5. 



A Cuban species here figured is very similar to specimens from 

 Ecuador, identified by Barker as L. verhceki Newton and Holland. 

 The specimen figured on plate 23, figure 11, has a half diameter of 

 about 2.2 mm and a full diameter of about 4.5 mm ; thickness through 

 the center about 1.3 mm. The figure of the Cuban specimen should be 

 compared with Barker's figures. 



Locality and geologic horizon. — Just south of El Jique, west side, 

 6 miles above mouth of Rio Yateras, altitude 150 feet above sea-level, 

 near Guantanamo, Cuba, U.S.G.S. locality no. 7553, O. E. Meinzer, 

 collector. The geologic horizon is middle Oligocene. The Cuban ma- 

 terial possesses an especial interest in that it suggests geologic corre- 

 lation between one horizon of the Ecuadorian Tertiary section and 

 deposits in Cuba. 



LEPIDOCYCLINA (NEPHROLEPIDINA) sp. 

 Plate 21, fig. 2; plate 32, fig. i 

 1924. Lepidocyclina {Nephrolepidina) marginata Vaughan, Bull. Geol. Soc. 

 Amer., vol. 35, p. 798, pi. 34. fig- i- 



The specimens illustrated by plate 21, figure 2, and plate 2,^, figure 

 I, represent forms that have been identified by Cushman and others as 

 L. marginata. There are at the Scripps Institution large suites of 

 L. marginata from northern Italy, and comparison of them with the 

 American material at my disposal convinces me that I have not seen 

 L. marginata in any American collections that I have studied. 



The specimens here figured were collected by D. R. Semmes and 

 T. W. Vaughan on Rio Pantepec, 1.5 km south of Buena Vista Haci- 

 enda House, Puebla, Mexico, in the Meson middle Oligocene. 



