42 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



part of the specimen illustrated. As the number, arrangement, and 

 Other features can be seen in the figures, further description seems 

 unnecessary. It will be remarked, however, that stoloniferous aper- 

 tures can be seen in a few chambers near the peripheral end of figure 4. 

 Localities and geologic horison. — LepidocycUna gigas is one of the 

 most conspicuous and widely distributed species in the middle Oligo- 

 cene of the Caribbean and Gulf regions. The types were obtained by 

 me at Hodges Bluff in the Island of Antigua, where it is an abundant 

 species at many localities. It has been found in its typical or some 

 varietal form in Cuba, southern Georgia and Alabama, Florida, eastern 

 Mexico (where Cushman's var. mexicana is characteristic of the 

 Meson formation), Jamaica, and elsewhere. 



LEPIDOCYCUNA sp. indet. a 

 Plate 26, fig. 5 



Test strongly inflated in the central portion ; diameter, about 8 mm ; 

 thickness through the center, 4 mm ; narrow, thin margin, about i mm 

 wide and 0.4 mm thick around the edges ; surface finely but strongly 

 papillate, papillae, o.io to 0.15 mm thick and about the same distance 

 apart, project very slightly above the outer surface. 



Embryonic chambers unknown. 



Equatorial chambers increase in height from the center toward the 

 periphery, about 0.05 mm high at the center and 0.20 mm high at the 

 periphery 4 mm from the center; the increase in length (radially) 

 much less, about 0.05 mm near the center and between 0.075 ^"^ O-^^ 

 mm at the periphery. 



Lateral chambers strikingly regular in size and arrangement. Num- 

 ber of layers over the center about 35 ; the number decreases toward 

 the periphery to only 3 or 4 at the margin of the test. The walls 

 between successive layers are uniform in thickness, considerably 

 thicker at the junction of adjacent tiers. The length of the chambers 

 is also irregular, increasing somewhat toward the outer surface ; a 

 common length is about 0.15 mm. Pillars are well developed and are 

 long; they increase slightly in thickness toward the outer surface 

 where the emergent distal ends produce the papillae above described. 



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

 east of Jamaica, northeast of Guantanamo, Cuba, U.S.G.S. locality 

 no. 7664, collected by N. H. Darton. Oligocene. 



