272 PORAMINIFERA OF THE CRAG. 



14**. Var. LINEATA. 



PL I, fig'. 69, may be the young form of P. frond If ormis, hnt is probably a small 

 variety (var. lineata), more regularly ovate in outline, with its edges entire, its 

 chambers fuller, and its surface ornamented with delicate longitudinal sculpturing, 

 somewhat like th?.t of P. puchella, d'Orb., and still more like that of the " striato- 

 fistulose specimen from the Crag (' Trans. Linn, Soc.,' vol. xxvii, pp. 246 and 252). 

 This specimen seems to have been lost ; and unfortunately the figure escaped 

 notice when the new plates and woodcuts were being drawn. 



Occurrence. — As far as is at present known, PolymorpMna frondif ormis is 

 absolutely peculiar to the Coralline Crag of East Anglia. At the time of the 

 publication of the First Part of this Monograph, it had been found at Sutton only. 

 We have now obtained specimens, with varying frequency, from every zone 

 examined. 



15. PoLYMORPHiNA VARTATA, Joues, ParJcer, and Brady, 1866. Plate I, figs. Q*?^ 68; 



Plate V, fig. 27. 



Part I, 1866, Appendices Nos. 1 and 2, Tables, footnotes. 



PoLTMOiiPHiNA VABTATA, ./., P., and B. Monogr. Foram. Crag, Appendices i and 



ii, footnotes ; pi. i, figs. 67, 68 ; pi. v, 

 fig. 27. 

 — — B., P., and J., 1870. Trans. Linn. Soc, vol. xxvii, p. 237, 



pi. xl, fig. 24. 



Characters. — Shell suboblong, compressed, asymmetrical, few-chambered. 

 Margin rounded, somewhat constricted at the septal lines. Chambers slightly 

 inflated. Surface uneven, studded with irregular angular depressions imparting a 

 mottled appearance to the whole exterior. Orifice variable ; simple or labyrinthic. 



These large Polymorphinse from the Crag have a surface-ornamentation that 

 has not been observed in specimens from other localities. It consists of unequal, 

 irregular, angular depressions, sometimes bordered by a slightly raised line. The 

 shell-wall is coarse and thick ; and the terminal orifice sometimes differs from the 

 normal circular aperture, becoming labyrinthic, or even divided into two or three 

 distinct perforations. 



Occurrence. — Polymorjjhina variaia, like P. frondlformis, appears to be confined 

 to the Coralline Crag of East Anglia. It has been found in every zone we have 

 examined ; but most plentifully at Sutton (zone f), and Sudbourne Hall (zone d). 



