42 PROCEEDINGS OF THE NATIONAL MUSEUM vol.77 



In its general aspect excepting for the depressed sutures, Guttulina 

 roemeri bears much resemblance to Globulina rotundata. It is not 

 difficult to separate them if one examines closely their earlier stages. 

 By taking off one chamber from such specimens as Globulina obtusa 

 or G. globosa figured by Bornemann, they are very close to Globulina 

 gibba. On the other hand, Guttulina roemeri is undoubtedly derived 

 from such a form as Guttulina problema by losing the quinqueloculine 

 arrangement of chambers and the chambers becoming more inflated 

 and embracing. The sutures, therefore, are always more or less 

 depressed. 



Globulina roemeri figured by Reuss appears to us not to represent the 

 typical form of the species. Although its sutures are depressed, it 

 resembles Globulina rotundata in its general aspect. 



Guttulina dejormata described by Reuss in the same paper as the 

 above species, with its test almost triangular in the end view is close 

 to Grzybowski's Polymorphina deflexa from the Miocene of Europe. 



Such a form as the latter is of the most common occurrence in 

 various deposits. In the synonymy of the present species, Egger's 

 Polymorphina uvula may be placed with some doubts. Egger's 

 specimens are apparently very variable, but they have invariably 

 triangular sections and the chambers are separated by the depressed 

 sutures and arranged in a nearly triserial series. Awerinzew's Poly- 

 morphina dubia is close to the present species, the dift'erence being 

 mainly in the one extra chamber, and is undoubtedly to be placed in 

 the synonymy of the present species. 



Distribution. — Specimens referred to this species are in our collec- 

 tion from the following localities : 



Recent. — Off Tripoli. 



Pliocene. — Crag of Sutton, England. 



Miocene. — Austria, Tortonian, Amphistegina marl of Grunes Kreuz, 

 Nussdorf, Vienna. France, Burdigalien moyen, Le Coquillat, Leog- 

 nan. United States, Choctawhatchee marl. Red Bay, Fla. 



Oligocene. — Germany, Ahnatal, near Cassel; Doberg, near Biinde. 

 Mexico, near Cuesta Blanca, Zacamixtle, Vera Cruz. 



GUTTULINA ROEMERI (Reuss) var. GIGAS (Karrer) 



Plate 9, figures 4 a-c 



Polymorphina gigas Kakrer, Abhandl. k. k. geol. Reichsanst, vol. 9, 1877, 

 p. 384, pi. 16 b, fig. 44. 



Variety differing from the typical by the more compressed and 

 compact test and less depressed sutures with the apertural end more 

 tapering. 



Length 0.75 mm.; breadth 0.38 mm.; thickness 0.35 mm. 



Ozawa examined the original specimen in the Museum of Natural 

 History, Vienna, and found that the species is very close to Guttulina 



