44 THE NAUTILUS. 



less angular, and has no band above the periphery. The minute 

 and very beautiful granulation is somewhat variable. 



Ganesella myomphala euomphala n. subsp. 



The shell is more depressed than myomphala, with the umbilicus 

 open, though partially arched over by the dilated columellar lip, 

 which, however, is not in the least impressed in the axial region. 

 The form is much less depressed than G. m. omphalodes. 



Alt. 24, diam. 36 mm.; whorls 6^. 



Alt. 23.5, diam. 35 mm.; whorls 6|. 



Alt. 22.5, diam. 31 mm.; whorls 6^. 



Nakamura, Oki. Cotypes No. 95835, A. N. S. P., from No. 1560 

 of Mr. Hirase's collection. 



A smaller form of this subspecies was taken in small numbers (10 

 individuals) on Chiburijima, Oki. Two measure : 



Alt. 18.2, diam. 24.5 mm.; whorls 6. 



Alt, 17, diam. 23 mm.; whorls 6. 



Ganesella fer rug inea okiensis n. subsp. 



The shell is much elevated, bullet-shaped, the outlines of the spire 

 strongly convex; narrowly, obliquely umbilicate; rich chestnut-brown, 

 encircled with a narrow yellow band at the periphery and ascending 

 the spire above the suture ; Mirface nearly lusterless, rather weakly 

 marked with growth-wrinkles and minute spiral lines, some inter- 

 mediate whorls of the spire punctate or subpapillose. Whorls con- 

 vex, the last rounded periferally, convex beneath. Aperture very 

 oblique, the upper and columellar margins subparallel; baso-columellar 

 margin straightened, thickened within, the edge reflexed. 



Alt. 19.5, diam. 17 mm.; whorls 6^. 



AH. 17, diam. 16.2 mm.; whorls 6|. 



Alt. 17, diam. 15.5 mm.; whorls 6. 



Nakamura, Oki. Types No. 95820, A. N. S. P., from No. 1564 

 of Mr. Hirase's collection. 



This form is well distinguished by its high contour. It may prove 

 to be specifically distinct, but for the present we prefer to attach it 

 to the widely distributed G. ferruginea of the main island. 



Chloritis tosanus okiensis, n. subsp. 



Umbilicus wider than in G. tosanus, contained six times in the 

 diameter of the shell. Hairs of the surface not so close. 



Alt. 8.8, diam. 16.8, width of umbilicus 2.8 mm. 



