8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 89 



Lepidocycl'ma named by Willard Bern- in his papers on Peruvian 

 species of Lepidocycl'ma are valid. 



A brief note will be given on variation in the emljryonic chambers 

 of megalospheric forms. The type of embryonic chambers is not 

 absolutely fixed. In some species, such as L. yurnagunensis, the 

 chambers may be those of Lepidocyclina s.s. or they may verge toward 

 Nephrolepidina. In L. undosa, the chambers may be nephrolepidine or 

 eulepidine. My surmise is that similar variation may occur in L. favosa. 

 Notwithstanding variation, it is my opinion that the embryonic 

 chambers of the megalospheric generation in Lepidocyclina furnish 

 convenient and useful features for subdividing the genus into sub- 

 genera. 



DESCRIPTION OF SPECIES 



LEPIDOCYCLINA (LEPIDOCYCLINA) NOVITASENSIS Vaughan, n. sp. 



Plate I, figs. 1-4 



1919. Orthophragmitui pustulata Cushman, Carnegie Inst. Washington Publ. 



291, pi. 9, fig. 6 (na; pi. 9, fig. 7). 



1920. Orthophragmina sculpturata Cushman, U.S. Geol. Surv. Prof. Pap. 125, 



pi. 8, fig. 3 (not pi. 9, figs. 4-7). 



The same specimen is referred to in both of the citations given above. 

 The description of the external features of "" Orthophragmina " pustu- 

 lata is based on this or a similar specimen. It reads as follows : 



Test circular, lenticular, thickest in the middle, thence gradually thinning 

 toward the periphery, which is without a carina or thinner portion; thickness 

 about one-fifth the diameter; surface finely pustulose, papillae larger and more 

 numerous near the central region, thence gradually decreasing in size and 

 number toward the periphery. 



I picked out of the matrix a number of specimens similar in every 

 respect to the one represented by Cushman's figures cited above and 

 had a horizontal and a vertical section cut. These specimens belong 

 to the genus Lepidocyclina and not to Discocyclina, as do the other 

 specimens figured by Cushman. Both Discocyclina and Lepidocyclina 

 occur in the same rock. Cushman made an error in considering a 

 specimen of which he had a surface view as belonging to the same 

 species as specimens of which he examined sections. Fortunately, the 

 type is designated as " section from station 3567, lowermost 100 feet 

 of Tertiary running in above serpentine, northwest of Recreo, Matan- 

 zas Province, Cuba" (U.S.N.M. no. 328188). That specimen is 

 Discocyclina. The specimens here considered may, therefore, be re- 

 garded merely as erroneously identified. 



