AET. e FORAMINIFEEA: POLYMORPHINIDAE— CUSHMAN AND OZAWA 135 



acute; chambers compressed, elongate, arranged in a clockwise sig- 

 moid series, each succeeding chamber not much removed from the 

 base; sutures not depressed but distinct; wall smooth, thick; aperture 

 radiate. 



Length of figured specimen 0.90 mm.; breadth 0.75 mm.; thick- 

 ness 0.40 mm. 



Holotype. — (Cushman Coll. No. 11851.) From middle Oligocene, 

 Hermsdorf, near Berlin, Germany. 



Sigmomorphina bornemanni bears a close relationship to S. regularis 

 and might be taken as a young stage of the latter, and naturally 

 Reuss himself placed it under Polymorphina anceps { = S. regularis). 

 If however, we compare the species with a young specimen of Sigmo- 

 morphina regularis, for example, such specimens as figured by Borne- 

 mann under the name of P. humboldti, it is not difficult to separate 

 them. In Sigmomorphina bornemanni each succeeding chamber is 

 added laterally and all chambers extend down almost to the base, 

 while in S. regularis, even in its young stage, each succeeding chamber 

 is removed from the base so that the test is much elongated. Sigmo- 

 morphina bornemanni might be considered to represent the micro- 

 spheric form of S. regularis, but we have no evidence to assume it. 



Polymorphina dilatata is preoccupied by d'Orbigny, therefore a new 

 specific name bornemanni is given for Bornemann. It must be noticed 

 here that Guttulina dilatata Reuss described from the Vienna Tertiary 

 is different from the present species, although some authors have 

 considered them the same. 



Distribution. — Reuss described the present species from the Oligo- 

 cene of Hermsdorf near Berlin where it occurs rarely. We have speci- 

 mens from the original locality as well as from the Oligocene of 

 Diisseldorf, and Ahnatal, near Cassel. 



SIGMOMORPHINA GALLOWAYI Cushman and Ozawa, new species 



Plate 36, figures 4 a, 5 



Test compressed, more or less twisted, oval in side view, caudate 

 at the initial end; chambers elongated, slightly compressed, arranged 

 in a contraclockwise sigmoid series, each succeeding chamber not 

 much removed from the base; sutures but little depressed, distinct; 

 wail smooth, rather thin, transparent; aperture radiate. 



Length of holotype 0.90 mm. ; breadth 0.55 mm. ; thickness 0.22 mm. 



Holotype. — (Cushman Coil. No. 11855.) From Albatross D4807, 

 coast of Japan. 



The twisted, compressed, oval test is characteristic of the species. 

 Its nearest ally is Sigmomorphina aliceae, which is more elongated, 

 and the chambers shorter and broader. This species is named for 

 Dr. J. J. Galloway, of Columbia University. 



Distribution. — Known only from off the coast of Japan. 



