128 PROCEEDINGS OF THE NATIONAL MUSEUM vol.77 



Distribution. — SigmomorpJiina regularis is one of the specialized 

 species and appears to be limited to the German Oligocene and 

 possibly the Cooper marl of the United States. We have specimens 

 from the following localities : 



Oligocene. — Germany, Ahnatal, near Cassel (abundant); Herms- 

 dorf, near Berlin; Doberg, near Biinde; Escherhausen ; Diisseldorf; 

 Dickholzen, Hildesheimeswald. 



Upper Eocene. — Cooper marl, United States, Cooper River, S. C; 

 pit on United States Highway No. 17 about 1 mile south of Moncks 

 Corner, Berkeley County, S. C. 



SIGMOMORPHINA FRONDICULARIFORMIS (Galloway and Wissler) 



Plate 33, figures 2 a, b 



Polymorphina frondiculariformis Galloway and Wisslek, Journ. Pal., vol. 

 1, 1927, p. 55, pi. 9, fig. 6. 



Sigmomorpha (Sigmomorphina) frondiculariformis Cushman and Ozawa, 

 Contr. Cushman Lab. Foram. Res., vol. 4, 1928, pi. 2, fig. 12. — Cush- 

 man, Special Publ. No. 1, Cushman Lab. Foram. Res., 1928, pi. 27, 

 fig. 12. — Cushman and Ozawa, Jap. Journ. Geol. Geogr., vol. 6, 1929, 

 p. 81, pi. 17, fig. 23. 



Frondicularia inaequalis Bagg (not Costa), Bull. 513, U. S. Geol. Survey, 

 1912, p. 60, pi. 18, figs. 1, 2. 



Test elongate, lanceolate, compressed, the initial end with a 

 prominent spine; chambers elongated, compressed, arranged in a 

 contraclockwise sigmoid series, each succeeding chamber only slightly 

 removed from the base; sutures slightly depressed, distinct; wall 

 smooth; aperture produced, radiate. 



Maximum length 2 mm.; breadth 0.70 mm.; thickness 0.20 mm. 



The present species is one of the well defined species of the genus. 

 Its elongated chambers arranged in an open sigmoid series and its 

 strong initial spine are the characteristics of the species by which it is 

 easily distinguished from others of the genus. 



Distribution. — This species is only known from the later Tertiary 

 in California and Recent ofT the coast. It is common in the upper 

 Pliocene of Timms point, San Pedro, Calif., and rare in the Pleis- 

 tocene of Lomita quarry, Palos Verdes Hills. We also have the 

 species from off La JoUa, Calif. 



sigmomorphina TORTA (Galloway and Wissler) 



Plate 33, figure 3 



Polymorphina torta Galloway and Wissler, Journ. Pal., vol. 1, 1927, 



p. 55, pi. 9, fig. 5. 

 Sigmomorphina torta Cushman and Ozawa, Jap. Journ. Geol. Geogr., vol. 6, 



1929, p. 81. 



Test elongate, elliptical, acuminate toward the base, compressed 

 and twisted, the initial end with a blunt spine; chambers elongate, 



