526 PROCEEDINGS OF THE ACADEMY OF [1899. 



Named in honor of Mr. T. Iwakawa, the author of a meritorious 



essay upon the Japanese species of Viviparus. 



Enlota (Acusta) Gainesi nom. nov. 



Helix IcEta Gld. 1859, not Helix loeta. Pfr. 1854. Vide Novitates Con- 

 chologiciE, pi. 143, figs. 17, 18, 19. 



This species differs from the typical forms of the subgenus Acusta 

 in having the peristome distinctly reflexed in adult examples. 

 The figures cited above, represent a specimen not quite mature and 

 less strongly wrinkled than my type. The color is either olive 

 brown or olive yellow without bands, or varied by two broad 

 bands. The interior of the aperture is blue gray, the columella 

 pinkish lead color, pale pink at the outer edge, like the whole 

 outer lip. The surface is glossy, coarsely wrinkled along the lines 

 of growth, showing spaced engraved spirals under the lens, and an 

 extremely minute, dense criss-cross scratching throughout when 

 not obliterated by wear. Whorls 5^. 



Alt. 27, diam. 32 mm. ; aperture 22 mm. long, 20 wide (meas- 

 ured outside peristome). 



Ushika, Prov. Tishio. 



Eulota luna n. sp. PI. XXI, figs, l, 2, 3. 



Shell low-conic above, flattened below, with a large well-like 

 umbilicus, one-eighth the diameter of the shell, very slowly con- 

 tracting as it penetrates; white under a thin, pale yellow cuticle, 

 with two narrow chestnut bands, one above, the other below the 

 periphery, the former visible above the suture on the whorls of the 

 spire. Surface rather glossy, with fine irregular growth wrinkles 

 and some subobsolete spiral lines above. Spire conic with convex 

 lateral outlines. Whorls 6|^, slowly, regularl}'^ widening, convex, 

 the last rather more descending, with rounded periphery and base, 

 not deflexed in front. Aperture oblique, lunate oval; peristome 

 acute, outer margin slightly and the basal more expanded, dilated 

 at the columellar insertion, impinging upon the umbilicus. 



Alt. 16^, greatest diam. 20^, least 19i mm. 



Yurdamisawa, Prov. Ishikari (Gaines). 



This species, while probably a Euhadra, does not belong to the 

 hichuana group. It reminds one of Fyramidula solitaria (Say). 



I do not know of any closely allied Japanese species. 



