1905.] NATURAL SCIENCES OF PHILADELPHIA. 715 



Ichikimiira, Satsuma. Types No. 90,076, A. N. S. Phila., from No. 

 1,325 of Mr. Hirase's collection. 



This species resembles Microcystina ceratodes (Gude) in shape. It 

 is a much larger form, with the keel weak or subobsolete just behind 

 the lip. 



Microcystina hakonensis n. sp. 



Shell minutely perforate, low-conic above, convex below, the peri- 

 phery angular, becoming rounded near the aperture. Surface glossy, 

 rather weakly, distantly striatulate above, smooth below. Whorls 

 5+, convex, with well impressed suture, the last angular in front, be- 

 coming rounded on the last third. Base convex, impressed in the 

 middle. Aperture lunate. Peristome thin, the columella reflexed 

 above, internally a little irregular, but not distinctly thickened. 



Alt. 4, diam. 6 mm. 



Hakone, Sagami. Types No. 90,221, A. N. S. Phila., from No. 1,315 

 of Mr. Hirase's collection. 



This form, of which but 8 specimens have been received, differs 

 from Kaliella gudei by the angular, not acutely carinate periphery. 

 It has no vertical striation or spiral lines. 



Microcystina edgariana n. sp. 



Shell minutely perforate, with convexly low-conic spire and convex 

 base, the periphery obsoletely angular in front; yellowish, somewhat 

 transparent, very glossy. Surface irregularly, weakly marked with 

 growth-wi'inkles, but without spiral striation. Whorls 5^, convex, 

 slowly increasing, parted by a well-impressed suture, the last indis- 

 tinctly angular in front, its later half rounded peripherally. Aperture 

 lunate. Columellar lip narrowly reflexed above, sloping, thickened 

 within. 



Alt. 3.6, diam. 5 mm. 



Ikejijima, Osumi. Types No. 90,219, A. N. S. Phila., from No. 1,327 

 of Mr. Hirase's collection. 



This species stands near M. vaga P. and H., but it is more depressed, 

 larger, with a half whorl less. It resembles Macrochlamys (?) gudei in 

 color, texture and form, but that is a very much larger species. Only 

 seven specimens of M. edgariana were taken. Named in honor of Mr. 

 Edgar A. Smith. 



Microcystina kumejimana n. sp. 



Shell minutely perforate, with low conoid spire, rounded periphery 

 and convex base; thin, yellowish, somewhat translucent and brilliantly 

 glossy. Surface showing rather coarse radial grooves, irregularly 



