LEITOrOMA. 2S1 



Sub-gen. myxostoma, Troscbel (Lituus, Martyn, not Browne). 



Operculum flat, thick, sub-cartilaginous. 

 Shell with the inner peristome continuous and entire, the outer 

 reflexed, with a beak behind closely pressed to the last whorl. 



brevis, Martyn. 



Genus LEPTOPOMA, Pfeiffer. 



Operculum circular, membranous, narrowly whorled, flat. 



Shell globosely turbinated or conical, narrowly umbili- 

 cated; peristome simple, reflexed, margins wide apart, 

 sometimes united by a very thin callus. 



E.v. L. immaculatum, Chemnitz, pi. 85, fig. 6. Oper- 

 culum, L. perlucidum, Grateloup, fig. 0, , C, b. Shell, L. 

 immaculatum, fig. 6, c. 



Nearly all the species of this genus are from New Guinea, 

 Borneo, and the Philippine Islands ; one small species is 

 from Pitcaim's Island ; and one or two are from Ceylon. 



Species of Leptopoma. 



acuminatum, Sow. insigne, Sow. 



acutimarginatum, Soiv. latelimbatum, Pfeiff. 



atricapillum, Sow. luteostoma, Sow. 



bicolor, Pfeiff. Massenae, Less. 



ciliatum, Sow. melanostoma, Petit. 



ciliferum, Mouss. Panayense, Sow. 



elatum, Pfeiff. perlucidum, Grat. 



fibula, Soiv. perplexum, Sow. 



goniostoma, Soiv. pileus, Sow. 



halophilum, Bens. regulare, Pfeiff. 



helicoides, Grat. sericatum, Pfeiff. 



ignescens, Pfeiff. undatum, Metcalfe. 

 immaculatum, Chem. 



