26 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 



The figured specimen is an unusual one, showing a great irregu- 

 larity in the overlapping of the chambers, which produces an unusual 

 arrangement of the sutures from the exterior. 



MARGINULINA SCHLOENBACHI (Renss) 



Plate 8, Figures 5 a, & 



Cristellaria schloenbacM Reiuss, Sitz. Akad. Wiss. Wien, vol. 46, pt. 1, p. 65, 

 pi. 6, figs. 14, 15, 1862 (1863). 



Test elongate, much compressed, curved, periphery rounded ; cham- 

 bers distinct, elongate, those of the later portion uncoiling and 

 becoming higher and less broad ; sutures distinctly curved especially 

 toward the periphery, limbate, flush with the surface; wall smooth; 

 aperture terminal, radiate. Length, 1.25-1.4; breadth, 0.35-0.4; 

 thickness, 0.2-0.25 mm. 



This species was originally described by Reuss from the Cretaceous 

 of Europe, and seems to be a variable one. It has been recorded by 

 numerous authors both from the Tertiary and as living in Recent 

 seas. 



MARGINULINA MODESTA Rensa 



Plate 8, Figures 6 a, b 



MarginuUna modesta Reuss, Sitz. Akad. Wiss. Wien, vol. 40, p. 207, pi. 7, 

 fig. 5, I860.— Franke, Verb. Nat. Hist. Ver., vol. 59, p. 275, 1912 (1913).— 

 CuSHMAN and Church, Proc. California Acad. Sci., ser. 4, vol. 18, no. 16, 

 p. 506, pi. 87, figs. 8-10, 1929. 



Test elongate, very little if at all compressed ; the early chambers 

 slightly coiled, later ones uncoiled and somewhat inflated, nearly 

 circular in transverse section; sutures distinct, slightly depressed; 

 wall smooth; aperture radiate, subterminal, somewhat toward the 

 peripheral margin. Length, 1-1.2; thickness, 0.45-0.5 mm. 



This is a common species in the Cretaceous of various parts of the 

 world and has already been recorded from the Cretaceous of Cali- 

 fornia, and it occurs in the Cretaceous of Trinidad and in the Gulf 

 Coastal Plain region of the United States. 



MARGINULINA BULLATA Renss 



Plate 8, Figures 7, 8 



MarginuUna Mllata Reuss, Verstein. Bohm. Kreide, pt. 1, p. 29, pi. 13, figs. 

 34-38, 1845-46; in Geinitz, Grundr. Verstein.. p. 656, pi. 24, fig. 16, 1845-46.— 

 Franke, Abh. geol. pal. Inst. Univ. Greifswald, vol. 6, p. 55, pi. 4, fig. 25, 

 1925; Abh. Preuss. Geol. Landes., vol. Ill, p. 76, pi. 6, fig. 28, 1928.— 

 CusHMAN and Jakvis, Contr. Cushman Lab. Foram. Res., vol. 4, p. 96, 

 pi. 14, figs. 7, 8, 1928.— Cushman and Church, Proc. California Acad. Sci., 

 ser. 4, vol. 18, p. 507, pi. 38, figs. 4-6, 1929. 



