498 Mr. H. B. Preston on nexo Land- Shells 



wished me to describe it should I fail in its identification. It 

 formed part of a series of freshwater fishes imported from 

 Puerto Mexico, on the north coast of the Isthmus of Tehuan- 

 tepec, which have been or are still living in Mr. Arnold's 

 aquarium at Hamburg. 



LXI. — Descriptions of Four new Species of Land-Shells from 

 J^atal and the Transvaal. By H. B. Preston, F.Z.S. 



Helicarlon subcornea, sp. n. 



Shell thin, subcorneous, brownish yellow ; whorls 3^, 

 rapidly increasing in size, the last considerably inflated, 

 marked with indistinct arcuate lines of growth ; sutures im- 

 pressed, slightly crenulate, faintly margined ; columella 

 descending steeply in a gentle curve ; peristome acute, 

 arcuate, the margins joined by a light parietal callus extending 

 into the interior of the shell ; aperture broadly sublunate. 



Alt. 12, diam. maj. 18 ram. 



Aperture : alt. 10'5, diam. 10 ram. 



Hab. Natal. 



The present species may be compared with FT. ampllata, 

 M. & Pons., but has not the highly polished and glossy 

 texture of that species ; it is also of a much paler colour, and 

 the surface is not malleated. 



ILelicarion suhconiea. Zinyis rosenhergi. 



Zingis roseiibergi, sp. n. 



Shell depressed, dark straw-colour, horny ; whorls 4^, 

 marked with lines of growth which are more accentuated just 

 below the sutures, giving to this portion of the shell a 

 wrinkled appearance ; last whorl subcarinate ; sutures im- 

 pressed, slightly crenulate; base of shell polished; umbilicus 

 narrow, deep, partly covered by the reflected columella; 

 columella descending obliquely, curved below; peristome 

 acute ; aperture obliquely broadly lunate. 



Alt. 9'5, diam. maj. Ib'lb mm. 



