THE NAUTILUS. 



Oshima, Osumi. Types no. 83385 A. N. S. P., from no. 931 of 

 Mr. Hirase's collection. 



This species differs from tlie allied A. vincius in its sculptured 

 neck and less developed "collar" or lip-rib. No land shell of the 

 important island of Oshima is known to be identical with species of 

 Kyushu or of the main island of Japan. 



Stenothyra formosana n. sp. 



Shell small, ovate, smooth and glossy, yellowish olivaceous. Spire 

 convex-conic, about 4 whorls remaining, the earlier ones being 

 eroded. Last whorl moderately inflated, distinctly compressed from 

 back to face, strongly contracting to the aperture, which is subverti- 

 cal, ovate, and not much exceeding one-third the length of the shell. 

 Length 3.9, diam. 2.2 mm. 



Kironten, Formosa. Types no. 86485 A. N. S. P., from no. 159 

 of Mr. Hirase's collection. 



This small, plain species is related to a form in the collection of 

 the Academy labelled S. glabra A. Ad., but is very much larger, 

 and not quite so much contracted at the aperture. S. glabra was not 

 very fully defined by Adams. It was described from Peiho, but has 

 been reported from Formosa by Nevill, Handlist Ind. Mus., p. 43. 



Melania hahajimana n. sp. 



Shell rather thin and light, yellowish olive, usually with some in- 

 distinct reddish longitudinal streaks on the spire ; somewhat glossy, 

 sculptured with irregular, unequal but fine spiral grooves and striae, 

 which on the spire cut the longitudinal growth-wrinkles into oblong 

 beads, irregularly and unevenly developed. The spire is slender 

 with slightly concave outlines. Apex eroded, 6 or 7 remaining 

 whorls but slightly convex, separated by an impressed, oblique 

 suture. Last whorl inflated in the middle. Aperture ovate, ob- 

 lique, broadly rounded below, the thin lip slightly sinuous. 



Length 34, diam. 10.5, length of aperture 10.5 mm. 



Length 30, diam. 10, length of aperture 10.8 mm. 



Hahajima. Ogasawnra. Types no. 8G45 A. N. S. P., from no. 

 172 of Mr. Hirase's collection. 



The slender spire, thin texture and inflated last whorl widely 

 separate this form from M, boninensis of Chichijima, the only Melan- 

 ian hitherto known from the Ogasawara-jima. It is related to M. 



