46 THE NAUTILUS. 



almost level, but the inner whorls are very slightly sunken. Whorls 

 5 to 5|, convex, slowly widening, the last falling a little to the 

 aperture and noticeably contracted at the lip ; the base impressed in 

 the middle as usual. Aperture nearly vertical, narrowly crescentic, 

 the lip thickened within by a strong white rib. Alt. 1.8, diam. 

 3.5 mm., or a little smaller, alt. 1.4, diam. 3.2 mm. 



Hahajima, Ogasawara. Type no. 82976 A. N. S. P., from 849b 

 of Mr. Hirase's collection. 



This was formerly thought to be a small form of H. biconcava, 

 but the study of additional specimens of both show H. planulata to 

 be constantly smaller, with a nearly level spire, while in biconcava 

 the spire is conspicuously sunken. 



KaUeJla incensa n. sp. 



Shell almost imperforate, depressed, the spire very low, conic, the 

 base convex, periphery rounded in fully mature shells; thin, yellow, 

 translucent and smoothish, under a strong lens seen to be minutely 

 and closely striate obliquely above, the strise decussate on the earlier 

 whorls, the base smooth. 



Whorls 3|, but slightly convex, the last nearly double the width 

 of the preceding. Aperture slightly oblique, lunate, the peristome 

 thin, columellar margin suddenly dilated and reflexed near the axial 

 insertion. Alt. 1.6, diam. 2.8 mm. 



Hakusan, Kaga. Types no. 84788 A. N. S. P., from no. 973a of 

 Mr. Hirase's collection. 



A small species with few rather wide whorls, the last one rapidly 

 widening. The columellar lip is more oblique than usual. It might 

 be placed in Microcystina, but it has the sculpture of Kaliella. 

 (Incensus, unrecorded.) 



Kaliella harimensis var. sadoensis n. var. 



This variety is somewhat larger than K. harimensis. It also re- 

 sembles K. okiana, but the columellar margin is less widely dilated. 

 It is from Shukunegimura, Sado ; types no. 84764 A. N. S. P., from 

 no. 1034 of Mr. Hirase's collection. 



