On neio Species of Land- Shells. 400 



occurrence this form may practically be disregarded in the 

 enumeration of the venomous species. 



It should be noted in connexion with these banded or coral- 

 snakes that a very great deal of variation characterizes the 

 greater number of species, and though they have been grouped 

 under many different names, it can hardly be doubted that 

 many of them will have eventually to be placed together. 

 The four here mentioned are definitely well-marked forms. 



LVII. — Diagnoses of new Species of Land-Shells from the 

 Islands of Blores^ Sumbawa, and Samba. By EdgAR 

 A. Smith. 



Ariophanta sumh'iwana. 



Testa depresse globosa, anguste umbilicata, dilute olivaceo-fuscesceus, 

 zona iiidistincta pallida prope medium ciucta, linea rut'a ad peri- 

 pheriam ornata ; spira breviter conoidea, ad apicem obtusa ; 

 anfractus sex, supei-iores parum convexiusculi, lineis incrementi 

 obliquis curvatis aliisque spiralibus miuute graiio-decussati, 

 ultimus laevior, inflatus, subtus niteus, hand descendens ; aper- 

 tura obliqua, late lunata, iutus albido-cserulescens, linea I'ufa 

 dimidlata ; peristoma tenue, margiue columellari albo, leviter 

 incrassato, ad insertionem expanse, reflcxo, umbilicum semi- 

 obtegeiite. 



Diam. maj. 43 millim., min. 34; alt. 27. 



JJab. Sumbawa, 4000 feet. 



Both the upper and lower surface of tlie body-whorl 

 exhibit faint si)iral stria?, which do not, however, proiiuce 

 fine granulation as on the upper whorls. Closely allied to 

 Nanina arguta^ Pfr., from Java, but more finely sculptured 

 and more rounded at the periphery and banded. 



Rhysota peramcp.na. 



Testa depressa, inflata, anguste umbilicata, tenuis, pallide fusco- 

 olivacea, apicem versus purpureo-rufeseens, circa medium anfr. 

 ultimi liuea rufacincta; spira convexa, brevis, obtusa ; anfractus 

 5.5, lineis incrementi obliquis arcuatis, striisque spiralibus con- 

 fertis subgranose eancellati, superiores vix convexiusculi, sub- 

 lente accrescentes, idtimus magnus, inflatus, couvexus, baud 

 descendens, circa umbilicum baud granulatus ; apertura obliqua, 

 latissime lunata, intus sordide can-ulcscens, in medio mii-zonata ; 

 peristoma tenue, margiue columellari prope insertionem reflexo 

 et dilatato, dilute cornco. 



Diam. maj. 41 millim., min. 33 ; alt. 26. 



Ilah. South Fiores, at 3600 feet. 



