— . 72 — 



corneo-fusca^ unicolor; spira par^um elevata, gradata, 

 apice obtuso; sutura sat impressa; anfr. 3-3 1/2 cari- 

 nati, gradati, supra carinam phmo-concaviusculi, sub- 

 lœves, penultimus transversim quadricostatus, ultimus 

 spiram superans, transversim novemcostatus^ basi sub- 

 lœvis ; apertura irregulariter oblo7igo-ovata, concolnr ; 

 peristoma simplex, marginibus distantibns, callo tenuis- 

 simo, vix conspicuo, in adultis speciminibus j'tmctis , colu- 

 mellari vix incrassato, basali rotundato, externo supra 

 médium subinftexo, arcuato, acuto, — Long. 6, diam. maj. 

 3 2/3 mill. (Coll. Crosse et Marie.) 



Habitat in lacu, ad locum « Vallée des Kaoris » dictuin, 

 Novœ Caledoniœ. (Petit, teste E. Marie.) 



Genus HEMISTOMIA (1) , Crosse, 1872. 



T. subimper for ata, elongata, tenuis ; spira elongata, 

 apice obtuso ; sutura impressa ; anfr. convexiusculi, 

 mediocriter numerosi, ultimus spiram vix subœquans ; 

 apertura oblique lunaris; peristoma simplex, integrum, 

 continuum, subsolutum, margine columellari valde obliquo, 

 incrassato, basali et externo late rotundalis. — Opercu- 

 lum ? 



5. Hemistomia Caledonica, Crosse. 



T. subimper forata, elongata, paludiniformis , subtruns- 

 lucida, tenuis, sub tegmento liiti plus minusve tenacis, 

 7iigricantis, olivaceo-cornea , unicolor ; spira elongata, 

 apice obtuso; sutura impressa; anfr. 5 1/2 convexiusculi, 

 sensim accixscenles, ultiimis spiram vix subœquans ; 



(1) Étymologie : «^i semi, a-TÔfia, os. 



