NO. II FORAMINIFERA OF VENEZUELA GRAVELL 23 



DISCOCYCLINA (ASTEROCYCLINA) KUGLERI Gravell, n. sp. 

 Plate 3, figs. I, 2, 3, 4, 5 



Test small, swollen, lenticular, with five to six short arms that start 

 near the periphery of the test ; surface densely papillate. Only megalo- 

 spheric individuals were found. Diameter of test 2.0 to 4.0 mm ; 

 thickness, i.o to 1.7 mm, heing about one half the diameter. The 

 central portion of the test is thick, double-domed, its sides sloping 

 gradually to a distance of about three fourths the radial distance from 

 the center and from there less steeply to the periphery. There is a 

 narrow, slightly undulating rim around the periphery, and it is ex- 

 tended into five or six short rounded arms which are usually broken ofi^. 

 Surface ornamented by small hexagonal papillae. The diameter of 

 those near the center is about 80 fi. They decrease in size toward the 

 edge, until the diameter is about 30 jx at the periphery. The distance 

 between papillae is approximately equal to their diameters. 



The embryonic apparatus is composed of two chambers. The initial 

 chamber is subglobular about 114 by 134 /a, partly embraced by a 

 crescent-shaped chamber whose dimensions are about no by 220 fi; 

 the walls are about 30 fi thick. 



Equatorial chambers are rectangular, arranged in annuli of varying 

 width. This irregularity of the width of the annuli makes the raylike 

 Asterocyclina-psLtiern of the equatorial chambers a little indefinite. 

 The equatorial chambers of the rays are radially elongate, radial 

 diameter about 50 to 60 ft; transverse diameter, 25 to 35 jx. The 

 chambers between the rays vary in length, ranging from square, 

 about 30 /u. on a side, to radially elongate forms about 30 by 60 fi. The 

 radial walls of adjacent -annuli alternate in alignment and have a 

 thickness of about 6 /x.. The equatorial layer is about 20 fi. high near 

 center and 80 fi high at a point 1.5 mm from the center; the length 

 of equatorial chambers is about 20 /x near the center and about 100 /< 

 at a point 1.5 mm from the center. 



The lateral chambers are very numerous, regular in size and form, 

 arranged in tiers. The number of layers in the thick umbonate region 

 is as many as 40 on each side of the equatorial layer, decreasing 

 gradually to one or two at the periphery. The length of the lateral 

 chambers varies from 60 to 80 /x, ; roofs and floors are about 6 yu. thick. 

 There are no real pillars, although the overlapping ends of the lateral 

 chambers, which are arranged in very regular tiers, give the ap- 

 pearance of pillars. 



Localities and geologic horizons. — Cotypes from locality 163. This 

 species also occurs at locality 149, associated with L. macdonaldi 



