1889.] LAND-SHELLS FROM KOROR, 113 



to a circular opening from the contraction of the inner shining portion 

 of the peristome ; no trace of tooth. Length 3 millim. 

 Hab. Koror. 



3. DiPLOMMATINA RUBELLA, Sp. HOV. (Plate XI. figS. 3, 3 0.) 



Shell sinistral, oblong, conical, thick, inconspicuously rimate, red- 

 dish or reddish white in colour: whorls (ik-7 ; sculpture a fine close 

 striation obliquely across the upper whorls, disappearing or very 

 faint on the penultimate, coarse and distant on the last whorl, pen- 

 ultimate the largest and most swollen, last whorl not ascending much 

 on to the penultimate, with a slight constriction just above the co- 

 lumellar margin : peristome very thick, about | breadth of shell, 

 the outer margin slightly or not at all dilated, striated between the 

 margins, the inner portion continuous : aperture circular ; no tooth. 

 Length 3 millim. 



Hab. Koror. 



4. DiPLOMMATINA AUREA, sp. iiov. (Plate XI. figs. 4, 4 a.) 



Shell dextral, ovate, fusiform, thick, of a yellowish colour, blotched 

 with black upwards : whorls 7k ; texture smooth, except a few (3 or 4) 

 coarse ribs across the 3rd and 4th whorls, and some faint striation on 

 the penultimate, chiefly just above the aperture ; penultimate whorl 

 the largest, constriction very faint ; last whorl not ascending much on 

 to the penultimate : peristome much thickened, about \ breadth of 

 shell, not dilated at its outer margin, striated between the margins ; 

 inner portion of lip continuous : aperture circular ; a small incon- 

 spicuous swelling on the columellar margin where a tooth is present 

 in other species. Length 4 millim. 



Hab. Koror. 



5. DiPLOMMATINA CRASsiLABRis, sp.nov. (Plate XI. figs. 5, 5rt.) 



Shell sinistral, tumidly fusiform, not rimate, thick, pale yellowish, 

 blotched with black : whorls 6|, the antepenultimate the largest ; 

 sculpture a fine close, regular, oblique striation across all the whorls, 

 a fold generally present on the last whorl at a little distance from 

 the peristome ; last whorl not ascending much on to the penultimate ; 

 a rather prominent constriction present on the penultimate above the 

 columellar margin : peristome very thick, more than g breadth of 

 shell, not dilated at its outer margin, the shining inner portion not 

 much expanded, continuous round the apex of the aperture in only 

 a very thin layer across which the striation of the penultimate whorl 

 is continued : aperture vertical, oblong ; a small tooth on the co- 

 lumellar margin, below this a semilunate ridge is present, which runs 

 back into the shell but not quite to the opposite margin. Length 

 2^ millim. 



Hab. Koror, 



6. DiPLOMMATINA ALBATA, sp. nov. (Plate XI. figs. 6.) 



Shell sinistral, oblong, not rimate, thin and transparent white, 

 shining : whorls 6g, the antepenultimate and penultimate much 



