706 PROCEEDINGS OF THE ACADEMY OF [Oct.^ 



Yaeyama, Ryukyu Islands. Types No. 84,787, A. N. S. Phila., from 

 No. 612a of Mr. Hirase's collection. 



Siplommatina tokunoshimana errans n. subsp. 



Shell similar to D. tokunoshimana except that the whorls of the con- 

 ical portion of the spire, and the back of the penultimate whorl are sculp- 

 tm^ed with widely spaced threads. On the front of the penultimate and 

 on the last whorl the thread-strise are much closer, though neither so 

 close or so fine as in tokunoshimana. 



Tamina, Kunchan, Ryukyu. Types No. 89,955, A. N. S. Phila., 

 from No. 1349 of Mr. Hirase's collection. 



In D. tokunoshimana and D. t. errans the spout or sinus at the foot 

 of the columella is developed more strongly than in D. paxillus Gredler, 

 of China ; the columella is straighter, and the mouth is more irregular 

 in shape, not approaching circular as in paxillus, the columellar margin 

 being vertical and straight. The Formosan D. hungerfordiana has a 

 much shorter cone than tokunoshimana. 



Diplommatina tosana kureana n. subsp. 



Differs from D. tosana by the longer, straightly conic upper half of 

 the shell, which tapers regularly from the penultimate whorl, while in 

 D. tosana the next earlier whorl is larger, and the spire convexly conic. 

 There is also nearly a whorl more, almost 7 in kureana, and the columel- 

 lar margin of the aperture is more straightened. The constriction is 

 above or barely behind the outer lip, as in tosana; the palatal plica is 

 long, covered by the parietal callus, and the columellar lamella strong 

 and horizontal. 



Length 3, diam. 1.7 mm. 



Kure, Tosa. Types No. 89,950, A. N. S. Phila., from No. 1,0276 of 

 Mr. Hirase's collection. 



Diplommatina tosana nogawana n. subsp. 



Shell smaller than D. tosana, composed of 6^ very convex whorls, 

 the penultimate swollen and predominating, very finely thread striate, 

 those above regularly tapering, more distantly thread-striate, the last 

 whorl smaller, with the striae more oblique and more distant than on 

 the penultimate, well rounded, the sutiu-e slowly ascending to the lip. 

 Constriction median above the aperture; the palatal plica is long, lying 

 chiefly in front of the parietal callus. Peristome well expanded, with 

 a narrow "collar" close behind it. Parietal callus small, with dis- 

 tinctly raised edge. Columellar lamella strong. 



Length 2.7, diam. 1.4 mm. 



