116 PROCEEDINGS OF THE NATIONAL MUSEUM vol.77 



POLYMORPHINA PARALLELA Millett 



Plate 30, figures Q a, b 



Polymorphina regularis var. parallela Millett, Trans. Roy. Geol. Soc. 

 Cornwall, 1894, pp. 4, 7 (list), pL, figs. 5, 6 a, b. 



Test compressed, oblong, margins nearly parallel; chambers elon- 

 gate, compressed, alternating; sutures not depressed; wall smooth, 

 translucent; aperture radiate. 



The present species is recorded by Millett under the name of Poly- 

 morphina regularis var. parallela. His description runs as follows: 



"This variety has the characters both of P. regularis and P.frondi- 

 formis. It differs from the former in having the lateral faces parallel, 

 and from the latter in the fact that the sutures do but rarely reach 

 the central line of the test, leaving a clear space from the oral to the 

 aboral ends." 



It is quite distinct from Sigmomorpha regularis in its arrangement 

 of sutures. It resembles in some features Polymorphina frondea, 

 but the latter has the periphery with raised margins. 



Distribution. — Millett's specimens are from the Pliocene of St. 

 Erth, England. 



POLYMORPHINA ALLENI Cushman and Ozawa, new species 



Plate 30, figures 7 a, b 



Polymorphina complanata Heron-Allen and Eahland, Journ. Roy. Micr. 

 Soc, 1909, p. 432, pi. 17, figs. 3-5. 



Test broadly oval, much compressed, symmetrical; chambers 

 curved, elongate, cylindrical, alternating, each succeeding chamber 

 slightly removed from the base; sutures depressed, distinct, uni- 

 formly curved; wall rather thin, translucent, smooth; aperture radiate. 



Length of holotype 0.70 mm.; breadth 0.37 mm.; thickness 0.12 

 mm. 



Holotype. — (Cushman Coll. No. 11777.) From Eocene, Brackle- 

 sham bed XVIII, White Cliff Bay, Isle of Wight, England. 



Heron- Allen and Earland described and figured from Selsey a pretty 

 biserial specimen of Polymorphina under the name of P. complanata 

 d'Orbigny. We have a specimen from the Brackleshani bed XVIII, 

 White Cliff Bay of Isle of Wight, which in every respect coincides 

 with Heron-Allen and Earland's species. This is quite distinct from 

 Polymorphina complanata from the Vienna Basin in the uniform, 

 strongly curved, cylindrical chambers, all of which come down much 

 farther toward the base than in P. complanata. 



To the present species a new specific name alleni is given for 

 Edward Heron-Allen. 



