THE NAUTILUS. 55 



might mean under trees, but here it refers to the resemblance to 

 Zonitoides arboreiis, one of the commonest snails of North America.) 



Microcystina circumdata n. sp. Shell perforate, depressed, with 

 low, conic spire, glossy, light yellowish-brown, somewhat trans- 

 lucent. Sculpture of slight growth-lines, and under a strong lens 

 there are seen to be excessively minute, close, engraved spiral lines 

 above, and shallow, weak, and much coarser spiral sulci beneath. 

 Whorls 4^, convex, slowly increasing, joined by an impressed suture, 

 the last whorl rounded peripherally, impressed around the perfora- 

 tion. Aperture lunate, oblique ; outer margin of the peristome thin 

 and simple, the columellar margin thickened within, narrowly 

 dilated at the insertion. Alt. 2, diam. 3.4 mm. 



Hachijo-jima, Izu. Types no. 8337G, A. N. S. P., from no. 949 of 

 Mr. Hirase's collection. 



This species is larger and less depressed than M. yahtensis, which 

 resembles it more than any other species which I have compared. 

 (Circumdatus, surrounded, i. e., by the sea.) 



Kaliella hachijoensi's n. sp. Shell imperforate, gloliose-conic, 

 smooth except for faint growth-stria?, yellowish-brown. Spire conic 

 with slightly convex lateral outlines, the apex obtuse. Whorls 5> 

 convex, separated by an impressed suture, the last inconspicuously 

 and bluntly angular at the periphery, convex beneath. Aperture 

 lunate, but slightly oblique ; peristome thin and simple, the columellar 

 end reflexed, whitish. Alt. 2.7, diam. 3.4 mm. 



Hachijo-jima, Izu. Types no. 83377, A. N. S. P., from no. 941 of 

 Mr. Hirase's collection, collected by Mr. Nakada, 1902. 



Kulieila poUida, n. pp. Shell minutely perforate, depressed conic, 

 glossy and smooth except for faint growth-lines, translucent, pale 

 yellowish-corneous, becoming whitish towards the apex. Spire 

 conoidal, the apex obtuse. Whorls 4^, convex, the suture impressed. 

 Last whorl rounded at the periphery, a little angular in front of the 

 apertjiire, convex beneath. Aperture broadly lunate, the peristome 

 thin 'and simple, triangularly dilated at the columellar insertion. 

 Alt. 2.5, diam. 3 mm. 



Hachijo-jima, Izu. Types no. 83378, A. N. S. P., from no. 952 of 

 Mr. Hirase's collection. 



These species are somewhat similar in contour to K. nanodes 

 (Gude) and K. reinhardti (Pils.), but are apparently different from 

 any of the described Japanese species. (Pallidus, pale.) 



