Quarterly Journal of Conchology. 121 



Lofig. anfr. 'j reliquonun2i viill.^Diam. anfr. penult. 5}^. 

 Long, tola probabiliter circiter 28. 



Shell scarcely rimate, thick, pale brownish clothed with a pale, 

 olive-brown epidermis, obliquely finely striated, clavately fusiform 

 with the spire above — ? (broken off") ; whorls about 12 slightly 

 convex, divided by a simple suture ; the last whorl a little narrower 

 than the penultimate, towards the lip a trifle more strongly striated; 

 the aperture somewhat oblique, ovately pear shaped, pale dirty 

 brownish within ; the upper parietal plication smallish, vertical, 

 reaching the margin of the peristome, the lower one scarcely 

 observable situated far within the aperture ; the subcolumellar 

 fold distinct produced to the edge ; the palatal plicae two in 

 number, the upper elongate, parallel with the suture, the lower 

 short, at right angles to the other ; the peristome continuous, every- 

 where slightly expanded and reflexed, double-edged exteriorly. 



Hab. Kobe. 



This species is remarkable for its solidity, thefaintness of the 

 oblique striation and the double edge to the peristome. The most 

 nearly allied form is CI. Buschii, Kiister, from which it differs in 

 being considerably larger and stouter, in the proportion of the 

 whorls and in the size of the aperture. In CI. Buschii the aperture 

 about equals in length the part of the body whorl above it, whereas 

 in the present species it considerably exceeds it, and in the former 

 species the body-whorl is much longer than the penultimate whilst 

 in the latter it just equals it, and it is to be observed that the in- 

 crease of the whorls is less rapid in bilabrata than in Buschii. The 

 armature of the mouth is almost similar, with the exception of the 

 inferior parietal plication being less conspicuous, and situated 

 farther within the aperture. The double edge of the peristome, 

 which is only visible when the shell is viewed from behind, is due 

 no doubt to age, a simple lip being first formed and subsequently 

 strengthened by a second callous deposit. The peristome of CI. 

 Buschii has been described as " breviter solutuni " which term can- 

 not be aptly applied to that of bilabrata as the callous margin 

 rests on the body-whorl. 



Owing to the thickness of the shell, the palatal plicoe are not 

 very distinct but they appear to be two in number, the upper one 



