Qiiarierly Journal of Couchology. 349 



the strongly marked obliijue lines of growth being intersected by 

 less pronounced spiral striae; this granulous sculpture becomes 

 almost obsolete on the upper half of the last volution and vanishes 

 entirely below the middle. The aperture is large and occupies 

 more than half the entire length of the shell ; it is oval in form, 

 acuminated above, and coated within with a bluish-white callous 

 deposit ; columella nearly perpendicular, curved very slightly in 

 an outward direction and tinted with a very pale shade of livid 

 pink. It is abruptly truncated below and invested with a thin 

 callosity, which extends over the oral side of the whorl and joins 

 the thin periteme above. 



Hah. Eastern Slope of the Drakensberg Mountains, at Lyden- 

 burg Ciold Fields, Transvaal, South Africa. 



The species is very readily distinguishable by the strongly 

 contrasting colors of the upper and lever portions. This division 

 of the shell by color into halves suggested the specific name which 

 I have ascribed to it. 



Achatina bisculpta. 



Testa tenuis, ovata, superne acuntinata, sub epidennide flavo-oUvacea 

 sordide albida vel cceruko-alba, strigis angustis pauIo tindu- 

 latis rufo-fuscis varigata; spira subacute con tea, apice pallido, 

 paiTO, obtuso ; sufura profunda^ vix obliqua ; anfractus yVn 

 percofivexi, confcttc granulati, ultiinus infra medium granulis 

 minoj-ibus ornata ; apertura panu irregulariter oralis, longit. 

 totins Yz pernio superanj, intus pallide cc^rulescens, strigis rufo- 

 fuscis pellucentibus ; columella in medio arcuata, inferne tor- 

 tuosa, basi abrupte truncata, albescens. 



Long. 46 mill. ; diam. 2j. Apertuia 2j longa., I3]A lata. 

 Hab. South Africa. 



