28 PROCEEDINGS OF THE NATIONAL MUSEUM vol.77 



The specimens having a contraclockwise arrangement of chambers^ 

 more or less resemble Guttulina lactea, but the sutures are more 

 depressed and the outline is more triangular instead of the oval or 

 ovate form of Guttulina lactea. 



Distribution. — Found only in the Japanese Pliocene deposits and as 

 a Recent form. 



GUTTULINA FRANKEI Cushman and Ozawa, new species 



Plate 4, figures 1 a-c 



Polymorphina lactea var. cuspidata Franke, Abhandl. Mus. Nat. Magde- 

 burg, 1925, p. 177, pi. 6, fig. 466. 



Test nearly quadrangular, almost symmetrical, apertural and 

 initial ends very acute, forming opposite diagonal angles, other two 

 angles rounded; chambers clavate, not embracing, earlier ones small, 

 later ones much enlarged, arranged in a clockwise, quinqueloculine 

 series; sutures depressed, distinct; wall smooth, rather thick; aperture 

 radiate. 



Length 0.60-0.82 mm.; breadth 0.35-0.55 mm.; thickness 0.25- 

 0.35 mm. 



Holotype (Cushman Coll. No, 10588). — From the middle Oligocene of 

 Sollingen, Germany. We also have specimens from the Oligocene 

 of Ceding, Westphalia, Germany. Very similar specimens occur in 

 the upper Eocene, Cooper marl of South Carolina. 



Guttulina frankei more or less resembles Guttulina irregularis in its 

 general characters, but the former has the more acute base, often with 

 a spine at its initial end. It differs from the microspheric form of 

 Guttulina irregularis which has invariably a rounded base and is 

 usually more or less equilaterally triangular. 



Franke's Polymorphina lactea var. cuspidata reported from the 

 lower Oligocene of Magdeburg is characterized by a cuspidate initial 

 end and is verj^ similar to the present species. However, the name 

 cuspidata has already been used by Brady, and we have attached 

 Doctor Franke's name to this species. 



GUTTULINA TRIGONULA (Reuss) 



Plate 4, figures 2 a-c 



Polymorphina trigonula Reuss, Die Verstein. bohm. Kreide, 1845, p. 40, 



pi. 13, fig. 84. — H. B. Brady, Parker, and Jones, Trans. Linn. Soc, 



vol. 27, 1870, p. 232, pi. 40, figs. 16a, b. 

 Polymorphina damaecornis Reuss, Die Verstein. bohm. Kreide, 1845, p. 40, 



pi. 13, fig. 85. 

 Polymorphina (Guttulina) damaecornis Jones and Chapman, Journ. Linn. 



Soc. Zool., vol. 25, 1896, p. 508, fig. 2 (in text). 



Test spheroidal, truncate at the base, obtuse at the apertural end ; 

 chambers rounded, inflated, arranged in a clockwise, quinqueloculine 

 series, each succeeding chamber extending back to the base but not 



