20 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



In vertical sections the lateral chambers occur in regular tiers be- 

 tween heavy pillars. There are about lo lateral chambers on each 

 side of the equatorial layer. The chambers over the center and near 

 the periphery are about lOO /x, in length «nd 38 p. in height. They 

 decrease in number until they are only one layer thick at the periphery. 

 The equatorial layer is 76 ft thick at the center of the test. It gradually 

 increases in height toward the periphery, where it is 200 /a thick, 

 including both walls. The height of the equatorial chamber cavities 

 at the center is 40 jx, at the periphery, 105 /j.. The pillars have a 

 diameter of 200 /i. 



Localities and geologic horizon. — Ridge southeast of Freetown, 

 Antigua, altitude 200 to 250 feet; Lynch Path, Antigua, altitude, 150 

 feet ; and St. Philip's churchyard, Antigua ; all samples collected by 

 W. R. Forrest ; middle Oligocene Antigua formation. 

 ■ The general aspect of L. antiguensis is somewhat like that of L. 

 giraudiK. Douville. The costae in L. antiguensis, except at the margin 

 of the apical area, are broad and low and become obsolete at the inner 

 edge of the marginal rim. The costae in L. giraiidi are more numerous, 

 more trenchantly develoi:>ed, and extend to the edge of the test. The 

 figures on plate 10 illustrate the dififerences. Figures 9 and 10 repre- 

 sent topotypes of L. girandi. 



LEPIDOCYCLINA (LEPIDOCYCLINA) GIRAUDI R. Douville 



Plate 10, figs. 9, 10; plate 24, fig. 4 



1907. LcpidocycUnu girandi R. Douville, Soc. Geol. France, Bull., ser. 4, vol. 7, 



P- 307, pi. 10, figs. 9, ID, 15, 16, text figs. I, 2. 

 1924. Isolepidina girandi H. Douville, Soc. Geol. France. Mem., n.s., vol. i, 



no. 2, p. 43. 



Giraud, just before his death, sent me topotypes from Pointe 

 Macabou, Martinique, and of them the exteriors of two specimens are 

 illustrated on plate 10, figs. 9, 10, and a horizontal section of another 

 on plate 24, figure 4. 



The tests are lenticular, small, larger specimens being 3.5 to 

 4 mm in diameter and about 1.5 mm thick. Over the center of the 

 test there are thick papillae which range in number from a few up to 

 as many as nine. From the outer boundary of the papillate area 

 strong costae extend to the periphery of the test. 



The embryonic chambers are subequal. The equatorial chambers 

 are lozenge-shaped near the center, outside this area they become 

 hexagonal, and near the periphery they are short-spatulate, similar 

 to those of L. parvula. Since H. Douville and I appear to disagree 



