620 PROCEEDINGS OF THE ACADEMY OF [Sept., 



except D. vespa, which represents a line of differentiation parallel to 

 the Bornean Paradiancta. 

 Diplommatina tosana n. sp. 



Shell imperf orate, cylindric, the upper third conical, tapering; light 

 red, darker red toward the apex, paler and sometimes more of a yellow 

 tint toward the last whorl; closely, finely and delicately rib-striate 

 throughout, the striae becoming more widely spaced on the cone, the 

 first whorl smooth. Whorls 6, the last rounded below, ascending in 

 front. The weakly marked constriction near the end of the penulti- 

 mate whorl is close to the peristome, being immediately behind it. The 

 aperture is round-ovate; peristome narrowly reflexed, strengthened by 

 a " collar" or lamella a short distance behind it. The parietal callous 

 extends nearly to the suture above. The columellar lamella is strong. 

 Palatal plica long, visible through the parietal callous, and not 

 extending beyond it. 



Length 3, diam. 1.7 mm. 



Nogawa, Tosa. Types No. 84,190, A. N. S. P., from No. 1,026 of 

 Mr. Hirase's collection. 



The constriction and palatal plica lie farther back than in D. cassa, 

 which is also a more slender species. 

 Diplommatina tosanella n. sp. 



This form is very similar to D. kyushuensis in contour and appear- 

 ance. The last two whorls are dull red, the rest of the spire bright 

 orange-red. Sculpture of fine close rib-striae on the last two whorls, 

 while on the spire the intervals between riblets are about twice as wide. 

 Whorls nearly 6J, convex, the slight constriction being in the middle 

 of the front side, visible externally as an oblique light line; the last 

 whorl is rounded below. Aperture nearly circular, the peristome thick- 

 ened outside. Parietal callous rather small, not approaching the 

 suture above. The columellar tooth is small. Palatal plica short, 

 wholly to the left of the parietal callous and situated as high as its 

 upper edge. The columellar and spiral lamellae and palatal plica are 

 low inside, not nearly so strong as in D. kyushuensis. 



Alt. 2.6, diam 1.3 mm. 



Nogawa, Tosa. Types No. 87,642, A. N. S. P., from No. l,026a of 

 Mr. Hirase's collection. 



D. cassa is decidedly more cylindrical and more evenly striate than 

 this species. 

 Diplommatina gibbera n. sp. 



Shell cylindric below, the upper half tapering in a rather long straight 

 cone ; varying from dull red with an orange lip to nearly white, with the 



