NKRITIXA. 73 



N. TROSCHELI, Recluz. Hab. unknown. 



N. CORONOIDES, Lesson. New Guinea. 



N. PENICILLATA, Gould. New Ireland. 



Subgenus NERIPTERON, Lesson, 1830. 



In the diagnosis of this group (p. 8), the columelhir margin is 

 stated to be edentulous, but this is in fact, only occasionally the case ; 

 usually there are traces of teeth, and sometimes they are very dis- 

 tinct, although small. 



N. AURICULATA, Lam. PI. 21, figs. 58-63. 



Rather convex, slightly striate, somewhat shining, brownish or oli- 

 vnceous, obsoletely reticulated with black lines or with lighter spots ; 

 aperture yellowish white, bluish black around the lip and on the 

 columellar area, margin of columella a little arcuate in the middle, 

 and minutely or obsoletely toothed. Diam. 15-25 mill. 



Ceylon, East Indies, Philippines, Viti Is. 



It is N. subalata, Recluz, N. subauriculata, Recluz (fig. 60), N. ros- 

 trata (figs. 61, 62), and N. Layardi (fig. 63,), Reeve, as well as var. 

 , Mo'rch. 



X. RUBICUNDA, Martens. PL 21, figs. 64, 65. 



Convex, very slightly striulate, yellowish brown or chestnut, uni- 

 colored, a little shining ; aperture ash color, peristome reddish, col- 

 umellar margin minutely multi dentate, area large, a little rugose, 

 slightly convex. Diam. 12 mill. 



Kapera River, Borneo, on floating timber. 



Supposed to differ from the preceding species by its small size,. 

 want of reticulated markings, etc. I think it will prove identical. 



X. TAHITENSIS, Lesson. PL 21, figs. 66, 67. 



Striate, and spirally slightly engraved with subdistant lines, light 

 olivaceous brown, without markings ; aperture greyish blue or yel- 

 lowish grey, columellar margin slightly sinous and minutely dentate 

 in the middle, columellar area slightly rugose and minutely punc- 

 tate. Diam. 19-25 mill. 



Ins. Taheiti, So/moan Is., Sandwich Is. 



The synonyms are N. auriculata, Sowb., N. Lamarckii, Desh., 

 N. marginata, Hombr. and Jacq., N. vespertina, X r uttall (PL 22, fig. 

 71), and N. Sandivichensis, Reeve (PL 22, fig. 73). 



