ART 6 FORAMINIFERA: POLYMORPHINIDAE — CUSHMAN AND OZAWA 35 



GtJTTUUNA REGINA (H. B. Brady, Parker, and Jones) var. CRASSICOSTATA Cushman and 



Ozawa, new variety 



Plate 11, figures 5 a-c 



Variety differing from the typical in the very broad, coarse costae 

 and in the shape of the test, which instead of having the greatest 

 breadth decidedly below the middle has a more regularly fusiform 

 test; the chambers not as inflated as in the typical form. 



Holotype of variety. — (Cushman Coll. No. 11891.) From the lower 

 Pliocene, Beaumaris, near Melbourne, Victoria, Australia. 



This variety is very distinct from the typical form. The costae are 

 extremely thick and heavy, even moie so than shown in the figure. 



GUTTULINA COSTATULA Galloway and Wissler 



Plate 6, figures 3 a, b 



Polymorphina {Guttulina) costatula Galloway and Wissler, Joura. 

 Pal., vol. 1, 1927, p. 57, pi. 9, figs. 10 a, h. 



Test short, somewhat fusiform, acute at both ends; chambers 

 inflated, rounded, not much embracing, arranged in a contraclock- 

 wise, quinqueloculine series, each succeeding chamber removed much 

 farther from the base; sutures depressed, distinct; wall ornamented 

 with numerous distinct, rounded costae, of which there are five more 

 strongly developed at the base, radiating from the acute initial end 

 independent of the sutures and taldng positions in accord with the 

 quinqueloculine arrangement of the early chambers; aperture pro- 

 duced, radiate. 



Length 0.40-0.60 mm.; breadth 0.27-0.35 mm.; thickness 0.18-0.24 

 mm. 



Guttulina costatula is very close in its general outline and ornamen- 

 tation to Guttulina regina (H. B. Brady, Parker, and Jones), but it 

 has generally much smaller dimensions, and its five strong costae 

 radiating from the initial end is an important character developed in 

 only one other known species of Guttulina. It is an ornamented 

 species close to a rather common species found in the same locality 

 (Guttulina guinguecosta Cushman and Ozawa), which has a smooth 

 wall excepting for the five strong costae developed at the basal region. 

 It grows much larger than the present species. 



Distribution. — The types were described from the Pleistocene, lower 

 bed, of the Lomita Quarry, Palos Verdes Hills, 2 miles south of 

 Lomita, Calif. We have specimens from the type locality, and also 

 specimens that seem to be identical from the Miocene of Filter 

 Quarry, Victoria, Australia. 



