ART. 8 THE FORAMINIFERA GENUS LEPIDOCYCLINA VAUGHAN 6 



LEPIDOCTCLINA (LEPIDOCYCLINA) MANTELLl (Morton) Qiimbel 



Plate 3, fig. 1 



1920. Lepidocyclina mantelli Cushman, U. S. Geol. Survey Prof. Pap. 125, p. 57, 



pis. 12-14 (references to previous literature). 

 1924. Isolepidina mantelli H. DouvilliS, Soc. geol. France, m4m., n. s., vol. 1, 



m^m. 2, p. 37, text figs 17 and 17 a-d. 

 1924, Lepidocyclina (Lepidocyclina) mantelli Vaughan, Geol. Soc. Amer. Bull,, 



vol. 35, pp. 796, 797, text fig. 1. 



There is no need for a redescription of the traditional Lepidocyclina 

 mantelli, but there is reason for questioning whether the traditional 

 L. mantelli is the true L. mantelli, for no expert on the genus has, so 

 far as I know, restudied Morton's type. In L. mxintelli as usually 

 accepted there are no pillars and the lateral chambers are low and 

 long, as shown on plate 3, figure 1 . In these features it differs from 

 the other American forms. 



Geologic horizon. — Oligocene, Marianna limestone at many locali- 

 ties in Alabama and Florida, and probably in Mississippi,^ 



LEPIDOCYCLINA (LEPIDOCYCLINA) MANTELLI (Morton) Giimbel, variety 



Plate 3, figs. 2a, 26, Plate 4, figs. 1-2 



This variety differs from the traditional Lepidocyclina mantelli by 

 having a finely papillate outer surface and small but well-developed 

 pillars and by somewhat more open lateral chambers, as shown by 

 plate 3, figures 2a, 2b, plate 4, figure 2, 



Locality and geologic horizon. — Perdue Hill, above Claiborne Land- 

 ing, Alabama River, Ala,; Marianna limestone; bed No. 3 of C. W. 

 Cooke's section. Collected by C, W, Cooke, 



Affinities. — This variety Hes between the usually accepted L. mxin- 

 telli and L. supera. It resembles the former except in the features 

 above indicated and it is somewhat thicker in the umbonal region. 

 It differs from L. supera by its greater diameter and by its less pro- 

 nounced lenticular form. The differences are^shown by plate 3, fig- 

 ures 2a, 2h. 



This variety appears to come from the original locality of Nummu - 

 lites mantelli Morton, and it may be the true L. mantelli, while the 

 usually accepted L. mantelli may be a variety which has no pillars 

 and no papillae on the surface. The type of the species, which is 

 probably in the Museum of the Academy of Natural Sciences of 

 Philadelphia, should be restudied, 



> See Cushman, U. S. Geol. Surv. Prof. Pap. 125. p. 125. 



