ART. 6 FOKAMINIFERA: POLYMORPH INIDAE — CXJSHMAN AND OZAWA 55 



17-20, 25-27. — Hosius (not Reuss), Ver. Nat. Hist. Vereins Pr. Rhein- 

 lande, vol. 50, 1893, p. 107, pi. 2, fig. 7. — Jones and Chapman, Journ. 

 Linn. Soc. ZooL, vol. 25, 1896, p. 510, figs. 11, 12 (in text).— Paalzow, 

 Ber. Oflfenb. Ver. Nat., 1912, p. 68, pi. 1, figs. 11, 12.— Cushman, Bull. 

 71, U. S. Nat. Mus., pt. 3, 1913, p. 86, pi. 40, fig. 2.— Franke, Dan- 

 marks Geol. Unders. 2, Raekke, No. 46, 1927, p. 36, pi. 3, fig. 12. 



Polymorphina {Guttulina) lanceolata Andreae, Abhandl. Geol. Special- 

 Karte Elsass-Lothringen, vol. 2, pt. 3, 1884, pp. 118, 141, pi. 9, figs. 

 18-20. 



Polymorphina tenera Karrer, Sitz. Akad. Wiss. Wien, vol. 58, abt. 1, 1868, 

 p. 174, pi. 4, fig. 9. 



Polymorphina sororia var. cuspidata Chapman (not H. B. Brady), Journ. 

 Roy. Micr. Soc, 1896, p. 13, pi. 2, fig. 13. 



Polymorphina ampla Cushman (not Karrer), Bull. Anier. Assoc. Petr. Geol., 

 vol. 10, 1926, p. 603, pi. 20, fig, 6. 



Polymorphina angusta H. B. Brady (not Egger), Rep. Voy. Challenger,. 

 Zoology, vol. 9, 1884, p. 563, pi. 71, figs. 17-19; pi. 72, fig. 4.— Chapman 

 and Parr, Journ. Linn. Soc. Zool., vol. 36, 1926, p. 392, pi. 21, fig. 75. 



Test fusiform to cylindrical, acute at both ends, often with a spine 

 at the mitial end, almost circular in end view; chambers rather short, 

 not much embracing, arranged at first in a nearly triserial series, later 

 becoming biserial; sutures not depressed, generally distinct; wall 

 smooth; aperture radiate. 



Length 0.55-1.25 mm.; breadth 0.20-0.50 mm.; thiclmess 0.20- 

 0.50 mm. 



There are many specific names given to this cylindrical member of 

 the genus, having the chambers rather short and not much embracing. 

 Of these names, that of Roemer's appears to be the earliest. Roemer's 

 figure, as nearly as can be made out and considered from our study 

 of many topotypes obtained from Cassel, seems to represent a rather 

 young stage, having but few chambers. Pyrulina Jusiformis is quite 

 distinct from Pyrulina cylindroides which has long fusiform chambers. 



Among the figures of Guttulina cylindrica given by Bornemann, 

 Figures 4 and 5 are fair representatives of the present species, and 

 Figure 6 is considered to be an adult specimen. Guttulina ovalis 

 Bornemann is closely related to Globulina minima but it has more 

 chambers regularly arranged, and it seems better to place it in the 

 synonymy of the present species. 



Reuss's Polymorphina lanceolata, figured in 1863 (excepting figures 

 76, 77), and Polymorphina subteres coincide in their every feature with 

 Pyrulina Jusijormis. 



Polymorphina tenera Karrer having a rounded initial end, and 

 Polymorphina sororia var. cuspidata H. B. Brady, with an initial spine, 

 are considered to be included in the range of variation of the present 

 species. 



