108 PROCEEDINGS OF THE NATIONAL MUSEUM vol.77 



Psecadium oblongum Franzenau, judging from his figure, is very 

 close to Hantken's species and is provisionally placed under the 

 present species. 



Distribution. — Hantken reported the present species from the Eocene 

 of Of en (Kleinschwabenberg) , where he found only one specimen. 

 Karrer noted its occurrence as very rare. We have a single specimen 

 from the Miocene (Tortonian) of the Vienna Basin. 



PSEUDOPOLYMORPHINA DIGITATA (d'Orbigny) 



Plate 28, figures 3 a, b 



Polymorphina digitata d'Orbigny, Guerin-Menevilles Cuvier, Iconographie, 



MoUusques, 1829-43, p. 9, pi. 3, fig. 3. 

 Polymorphina nodosaria Franke, Danmarks Geol. Unders. II, Raekke, No. 46, 



1927, p. 35, pi. 3, fig. 18. 



Test elongate, cylindrical, rounded at both ends; chambers short, 

 nearly as long as broad, slightly embracing, arranged in an entirely 

 biserial series; sutures but little depressed, distinct; wall smooth; 

 aperture radiate. 



Length of figured specimen 1.95 mm.; breadth 0.55 mm.; thickness 

 0.50 mm. 



The present species was only figured and not described by d'Orbigny 

 under the name Polymorphina digitata. 



Moreover, neither the locality nor geological formation of the species 

 was mentioned, and accordingly there is great difficulty in determining 

 exactly the species. We have several specimens from the Upper 

 Cretaceous of Maastricht, which in every feature resemble d'Orbigny 's 

 figure of Polymorphina digitata, and those specimens are provisionally 

 determined as the same as d'Orbigny's species, and one of them is 

 figured. 



Pseudopolymorphina digitata of our identifications resembles in some 

 respects P. spatulata from the Miocene of Europe, but the latter is 

 more compressed, and its chambers are longer. 



Distribution. — We have specimens of the species from the Upper 

 Cretaceous of Maastricht only. 



PSEUDOPOLYMORPHINA LEOPOLITANA (Reuss) 



Plate 28, figures 4 a-c 



Polymorphina leopolitana Reuss, Haidinger's Nat. Abhandl., vol. 4, 1851, 



p. 28, pi. 4, fig. 11. 

 Polymorphina rudis Reuss, Sitz. Akad. Wiss. Wien, vol. 44, pt. 1, 1861 (1862), 



p. 319, pi. 3, figs. 5-8. 



Test elongated, slightly compressed, rounded at the base; chambers 

 inflated, but little embracing, arranged in a nearly biserial series from 

 the beginning, often tending to become uniserial in later develop- 

 ment; sutures depressed, distinct; wall smooth; aperture radiate. 



