160 
aperture radiate with a weak slit ventrally. 
Diameter 1.2 mm,; thickness 0.4 mm. 
Holotype: IGPS 67018. 
This species differs from Rob ulus william - 
soni (Reuss) in the presence of distinct raised 
sutures near the umbo. 
Robulus lepidus (Reuss) 
PL 1, Fig. 13 
Robulus lepidus Cushman and Church, 
1929: 304, pi 26, figs. 15, 16. 
This species is said to be very common in 
the Upper Cretaceous rocks of Europe, Cali- 
fornia, and Mexico. The present specimens 
are identified with Robulus lepidus figured 
by Cushman and Church from the Upper 
Cretaceous of California. 
Robulus sp. 
PL 1, Fig. 16 
There are several incomplete specimens in 
the collection. The figured specimen has a 
distinct keel and an umbonate center, but 
PACIFIC SCIENCE, Vol. IV, April, 1950 
there is insufficient material for complete 
description. 
Genus Makginulina d’Orbigny, 1826 
Marginulina cretacea Cushman 
PL 1, Fig. 14 
Marginulina cretacea Cushman, 1937: 94, 
pi. 13, figs. 12-15. 
This species has been recorded from many 
localities in the Upper Cretaceous of the Gulf 
Coast region of the United States, but it is 
rare in the present collection. 
Genus Dentalina d’Orbigny, 1826 
Den talma cf. basiplanata Cushman 
PL 1, Fig. 11 
Dentalina basiplanata Cushman, 1946: 68, 
pL 24, figs. 1—6. 
The apertural end is not preserved in any 
of the present specimens, although the Lira - 
bate sutures are very characteristic as is shown 
in the figure. This species was originally de- 
scribed from the Corsicana Marl of Texas. 
EXPLANATION OF PLATE 
Figs, la—c; 3 a—c . Globotruncana canaliculata (Reuss). X 40. a, Dorsal aspect; b, peripheral aspect; 
c, ventral aspect. 
Figs. 2a— c; Aa-c. Globotruncana marginata (Reuss). X 40. a, Dorsal aspect; b, peripheral aspect; 
c, ventral aspect. 
Figs. 5a— c. Globotruncana sp. X 45. a, Dorsal aspect; b, peripheral aspect; c, ventral aspect. 
FIGS. 6a, h\ la, b. Silicosigmoilina futabaensis Asano, n.sp. X 40. a, Lateral aspect; b, apertural as- 
pect. (Fig. 6, holotype. Fig. 7, paratype. ) 
Figs. 8a— c. Trochammina hisanohamaensis Asano, n.sp. X 40. a, Ventral aspect; b, peripheral aspect; 
c, dorsal aspect. (Holotype.) 
Fig. 9. Palmula suturalis (Cushman). X 35. 
Fig. 10. Dentalina sp. X 40. 
Fig. 11. Dentalina cf. basiplanata Cushman. X 40. 
Figs. 12 a, b. Robulus futabaensis Asano, n.sp. X 40. a , Lateral aspect; b, apertural aspect. (Holotype.) 
Fig. 13. Robulus lepidus (Reuss). X 40. 
Fig. 14. Marginulina cretacea Cushman. X 40. 
Fig. 15. Ellipsonodosaria sp. X 40. 
Fig. 16. Robulus sp. X 40. 
Figs. 17*, b; 18 a—c. Anomalina fukushimaensis Asano, n.sp. X 40. 17*, Dorsal aspect; b, ventral 
aspect. 18*, Ventral aspect; b, apertural aspect; c, dorsal aspect. (Fig. 17, paratype. Fig. 18, holo- 
type.) 
Fig. 19. Vaginulina cf. lata (Cornuel). X 45. 
