POLYMORPH INA FRONDIFORMIS. 271 



from the Miocene of Vienna ; and from the Upper Tertiaries of north-west 

 Germany. We have specimens from the Casterlian of Antwerp ; and Mr. Millett 

 has recorded it from the Pliocene of St. Erth. In the Coralline Crag we have 

 found it in every zone examined. 



14. PoLyMOEPHiNA FRONDIFORMIS, Ssarhs Wood, 1843. Plate I, figs. 62, 68, 69 



(var.); Plate IV, figs. 11—14; Plate VII, 

 fig. 20 (var.). 



Part I, 1866, Appendices I and II, footnotes. 



PoLTMOEPniNA FEONDiFOEMis, Searles Wood, lSi3. In Morris's Catalogue of 



British Fossils, p. 62. 



— — Jones, Parker, and Brady, 1866. Monogr. Foram. 



Crag, Appendices i and ii (foot- 

 notes), pi. 1, figs. 62, 63 (not 69) ; 

 pi. iv, figs. 11 — 14. 



— — Brady, Parlcer, and Jones, 1870. Trans. Linn. 



Soc, vol. xxvii, p. 241, pi. sli, 

 figs. 33 a—c. 



Characters. — Shell large, elongate, compressed or complanate, iinsymmetrical. 

 Chambei'S long, oblique, irregular. Surface depressed over portions of the septal 

 lines ; sometimes smooth, but more frequently marked by exogenous shell-growths, 

 either in the form of rounded beads or short, interrupted costte. 



This form is related to P. complanata (megalospheric ?), but peculiar in its 

 habit and locality. The ornamentation ia very peculiar, and does not exactly 

 correspond with what is seen in allied genera. It consists (as in P. myrlstiformis) 

 of clear, bright, circular or oval beads, or of more or less interrupted costute of 

 the same sort, distributed irregularly in longitudinal direction over the flat sides 

 of the shell. 



14*. Var. EREVis. 



PL VII, fig. 20, illustrates a varietal form, var. hrevis, subovate in outline, with 

 relatively shorter and fuller chambers, ornamented chiefly near the edge with 

 irregular and subquadrate drop-like beads, such as occur among the costulfe on 

 other specimens. 



