- 356 - 



menti fortiores, spirales debiliores. Peristoma magis dilata- 

 tum, marginibus magis approximatis^ denticulo fortiore et 

 obliquiore. 



Lamina parietalis unica. Laminse palatales 6 sequidistantes , 

 horizontales, prima lœvis, cseterse semicirculares^ inter quin- 

 tam et sextam denticulus brevis conspicitur . 



Similar to the preceding species but Ihe whorls are 

 more flalleoed above, tbe last whorl is obtusely angiilated 

 above the periphery and descends more in front; the 

 spire is more depressed and the urabilicus wider, the 

 striaeare stronger but the spirals mucli finer and weaker 

 and they extend below the periphery ; the peristome is 

 more expanded, its margins more approaching, the parié- 

 tal ridge less tlexuous, and the dentlcle near its edge 

 stronger and more oblique. 



Fig. 5» 



Fig. 5»> 



Fig. S-: 



Fig. 



Fig. 5e 



Pariétal armature (fig. S**) composed of one vertica 

 plate obliquely deflexed posteriorly, its upper extremity 

 truncate, the lower portion more elevated than the upper 

 portion; in front of its upper extremity occurs a short ho- 

 rizontal fold, and in front of its lower extremity an 

 elongated denticle. 



Palatal armature (fig. 5°) composed of six equadistant 

 horizontal folds, the first low and short near the upper su- 

 ture, theotherssemicircular; the second, third, fourth, and 

 fifth attenuated and notched posteriorly, the third having 

 a curved ridge given ofï from the upper side before the 

 notch, the fourth with a short oblique free ridge posterior- 



