Japanese Land-Shells. 39£> 



Arnouldia nanodes, sp. n. 



Shell imperforate, depressed conoid ; under the microscope 

 seen to be very finely striated and decussated with close faint 

 spiral lines, the latter a little more distinct and wider apart 

 below ; thin, dull above, a little shining below, pellucid, 

 pale corneous. Spire depressed, apex obtuse, suture im- 

 pressed. Whorls 4, increasing slowly, the last angulated at 

 the periphery, tumid below near the mouth. Aperture 

 oblique, securiform ; peristome thin, straight, acute ; margins 

 approaching, the upper forming an obtuse angle with the 

 outer margin at the periphery ; columellar margin vertical, 

 slightly expanded above. 



Diam. 2'25, alt. 1*5 millim. 



Hub. Kioto. Type in my collection. 



The nearest ally of this form appears to be A. obtusangula, 

 Reinh., but that species is perforated and is composed of 5£ 

 whorls. Six specimens. 



Crystallus sulcatus, sp. n. 



Shell perforate, discoid, smooth above, very finely striated 

 below ; shining, pellucid, corneous. Spire depressed, suture 

 channelled. Whorls 4, rounded, increasing slowly at first, 

 the last widening rapidly, not descending in front, sunk round 

 the umbilicus. Aperture nearly vertical, roundly lunate ; 

 peristome thin, straight, acute ; margins distant, upper 

 arcuate, columellar margin slightly dilated over the narrow 

 umbilicus. 



Diam. maj. 4, minor 3 - 75; alt. 2 millim. 



Hab. Kioto. Type in ray collection. 



Two specimens only, one of which is imperfect. This 

 species is allied to G. microdiscus, Reinh. 



Crystallus velatus, sp. n. 



Shell narrowly perforate, discoid ; under the microscope 

 seen to be faintly striated and decussated with excessively 

 fine spiral lines ; shining, pellucid, corneous. Spire de- 

 pressed, suture impressed. Whorls 4, a little rounded, in- 

 creasing slowly, the last not descending in front, sunk round 

 the umbilicus. Aperture slightly oblique, narrowly lunate; 

 peristome thin, straight, acute ; margins distant, upper 

 arcuate, columellar margin slightly expanded over the narrow 

 umbilicus. 



Diam. 3 # 5, alt. 1*5 millim. 



Hab. Kioto. Type in my collection. 



