100 PROCEEDINGS OF THE NATIONAL MUSEUM vol.77 



Variety differing from the typical form in having the later cham- 

 bers more regularly biserial and accordingly the test more compressed. 



Length of holotype 3.10 mm.; breadth 1.87 mm.; thickness 

 0.81 mm. 



Polymorphina costata Allix reported from the Miocene of Touraine 

 appears to be a yomig specimen of the present species. We have a 

 specimen like Allix's figure from the Miocene of Pontlevoy. This 

 specimen is fistulose and resembles the young stage of the megalo- 

 spheric form of Pseudopolymorphina indica var. japonica. We can 

 not say definitely whether or not Allix's species is identical with the 

 present variety. The specific name costata of Allix's species is pre- 

 occupied by Egger in 1856, and therefore the present varietal name is 

 not disturbed by his species. 



The types of this variety are from the Pliocene of Sawane, island of 

 Sado, Japan. The specimen figured here is from Albatross Station 

 D4807, 44 fathoms, off Cape Tsiuka, Japan. 



PSEUDOPOLYMORPHINA RUTILA (Cushman) 



Plate 26, figures 3 a, b 



Polymorphina regina H. B. Brady, Parker, and Jones var. rutila Cushman, 

 U. S. Gaol. Survey Prof. Paper 133, 1923, p. 34, pi. 5, figs. 7, 8. 



Test compressed, elongate, fusiform, with a strong spine at the 

 base; chambers more or less elongated, not much embracing, alter- 

 nating; sutures more or less depressed, distinct; wall marked with a 

 few strong, longitudinal costae; aperture radiate. 



Maximum length 1.30 mm.; breadth 0.22 mm.; thickness 0.14 mm. 



This species is undoubtedly derived from Guttulina costulata Cush- 

 man by greatly reducing the quinqueloculine arrangement of cham- 

 bers in the young. Like Guttulina costulata, it is conspicuous by its 

 surface ornamentation. 



Distribution. — This species was described from the lower Oligocene, 

 the Byram calcareous marl at Leaf River, Miss. It occurs also in the 

 Byram marl at Byram, Miss. 



PSEUDOPOLYMORPHINA RUTILA (Cushman) var. PARRI Cushman and Ozawa, new variety 



Variety differing from the typical in the somewhat broader test 

 and coarser costae. 



Holotype of variety. — (Cushman Coll. No. 7833.) From Miocene, 

 Janjukian, soapy clay bed in Polyzoal limestone, Danger Point, 

 Torquay, Victoria, Australia. 



This variety is named for Mr. W. J. Parr, of Australia, whose in- 

 teresting collections have afforded us opportunity to study many of 

 the Australian forms. 



