THE NAUTILUS. 23 



Diplommatina cassa n. sp. 



Shell dextral, imperforate, oblong, rather thin, reddish amber 

 colored or whitish-corneous, composed of 6^ very convex whorls, 

 the last one narrower, strongly ascending. Surface densely and 

 regularly costulate-striate. Aperture subcircular, the peristome 

 continuous, thin, rather broadly and flatly reflexed, its face concave; 

 there is a sharp, high and narrow crest close behind the outer and 

 basal margins. Subcolumellar tooth strong; palatal fold short, situ- 

 ated to the left of the adjacent margin of the peristome. Length 

 3.1, diam. of penult, whorl 1.7. length of aperture 1.2 mm. 



Kodakari, prov. Ilida (no. 004), and Kyoto (no. 452), Y. Hirase. 



This species is related to D. nipponensis MlldfF., D. insularum 

 Pils., and D. Kobelti Ehrm. The conical part of the spire is much 

 shorter than in the former of these, judging from specimens from the 

 Hakone Mts., collected by Mr. B. Schmacker. 



D. Kobelti is a species slightly longer than D. cassa, finely 

 costulate-striate, composed of 1\ whorls, of which only the last two 

 are of equal diameter, those above tapering regularly, forming a very 

 long conic spire. The aperture is about as described for D. cassa. 

 Length 3.4, diam. 1.6, aperture 1.16 mm. It is thus slightly longer 

 than either nipponensis or cassa, witli one whorl more, and a longer 

 more pyramidal spire. It is from Kashima, prov. Harima, where it 

 occurs with D. cassa (no. 305 b of Mr. Hirase's collection). 



These species are all distinctly smaller than D.collarifera S. & R. 

 and D. tenuiplica Pils., and larger than D. uzenensis Pils. 



D. minutissima Mlldff. 1901, is a synomym of D. pusilla var. 

 omiensis Pils., published eight or nine months previously. Both 

 were based on Mr. Hirase's no. 487. 

 Tornatellina inexpectata n. sp. 



Shell umbilicate, pyramidal, thin, brown, glossy, smooth except 

 for slight growth-lines. Spire straightly conic, the apex obtuse. 

 Whorls 5|, slightly convex, the last rounded at the periphery, con- 

 vex below. Aperture subovate, armed within with a low entering 

 lamella on the middle of the parietal wall. Peristome thin, the 

 margins remote, columella!' margin broadly dilated and reflexed. 

 Length 3, diam. 1.7 mm. 



Yaeyama Island (Mr. Y. Hirase, no. 626). 

 Carychium cymatoplax n. sp. 



Shell minute, corneous-whitish, slender, cylindric-fusiform, almost 



