AKT.6 FOEAMINIFERA: POLYMORPHINIDAE — CUSHMAN AND OZAWA 87 



Guttulina globosa Bornemann, Zeitschr. deiitsch. geol. GeselL, vol. 7, 1855, 



p. 346, pi. 18, fig. 1. 

 Guttulina obtusa Bornemann, Zeitschr. deutsch. geol. GeselL, vol. 7, 1855, 



p. 346, pi. 18, fig. 2. 

 Guttulina turgida Reuss, Sitz. Akad. Wiss. Wien, vol. 18, 1855 (1856), 



p. 246, pi. 6, fig. 66. 

 Polymorphina turgida Reuss, Sitz. Akad. Wiss. Wien, vol. 62, pt. 1, 1870, 



p. 487. — V. ScHLicHT, Foram. Septar. Pietzpuhl, 1870, pi. 28, figs. 6-10; 



pi. 29, figs. 1-5. 

 Globulina subalpina GtJMBEL, Abhandl. kon. bay. Akad. Wiss. Miinchen, 



CI. II, vol. 10, 1870, p. 646, pi. 2, fig. 80 a, b. 

 Polymorphina subcruciata Terquem, M6m. Soc. G^ol. France, s6r. 3, vol. 2, 



1882, p. 140, pi. 14 (22), figs. 26, 27. 



Test ellipsoidal or ovoid to cylindrical, rounded at the base, slightly 

 produced at the apertural end; chambers rounded, almost as long as 

 broad, arranged in a nearly triserial series, each succeeding chamber 

 removed much farther from the base, rarely becoming almost uni- 

 serial in the last chamber; sutures but little depressed, generally 

 distinct; wall smooth, thick, often with fistuiose tubes; aperture 

 radiate. 



Length 0.45-0.90 mm.; breadth 0.30-0.60 mm. ; thickness 0.25-0.55 

 mm. 



In their monograph of the genus Polymorphina, H. B. Brady, 

 Parker, and Jones united many compact, oval species of the Poly- 

 morphinidae described by Bornemann in 1855 from the Septaria clay 

 of Hermsdorf under the name Polymorphina rotundata. This was 

 selected by them because it represented the best-developed specimen 

 in spite of the earliest name among their synonyms, which is Guttulina 

 fracta. 



The present species is almost circular in section; therefore its 

 figures show more or less differences according to the position of the 

 specimen drawn. For example, Bornemann's Guttulina obtusa, judg- 

 ing from his figures, has almost the same cylindrical test as his G. 

 rotundata, but in its sutures appears to be quite different from the 

 latter. Bornemann's Guttulina globosa (1855), although it has the 

 test more inflated at the base, presents the same feature of the 

 sutures as his Guttulina obtusa, so far as shown by the figures. The 

 difference of shape can be considered to be within the range of usual 

 variation. Terquem's Polymorphina subcruciata and d'Orbigny's 

 Polymorphina pupa, figured by Fornasini, are also related to the 

 present group. 



Reuss's Guttulina turgida from the Oligocene of Luithorst has the 

 later chambers each much farther removed from the base as in 

 Globulina rotundata, though it has almost an oval test. 



The present species as above described has a tendencj^ to add the 

 later chambers in a more or less uniserial series, as is shown in Borne- 

 mann's Guttulina fracta and G. incurva, of which the latter appears to 



