ACHATINA pallida, 

 Pale Achatina. 



Gexeeic Character. — See PI. 0.1. 



Specific Character^ 



A. (div, 2.) teita cinereo-alba, fasciis duabus angustis fusciSf spira elongata 

 recta, anfractibus 7 sub-ventrkosis, labio interiore roseo, columella basi 

 recta, Integra, apertura ovato-oblonga. 



A. Shell cinereous-white, with two narrow brown bands, spire elongated, 

 straight; volutions seven, slightly vcntricose, inner lip rosy, base of 

 the columella straight, entire, aperture ovate-oblong. 



The species of this and one or two other genera of land-shells 

 are subject to such variability in their colouring, that it becomes 

 extremely difficult to ascertain which are species and which va- 

 rieties. The shell now figured might, on a cursory glance, very 

 well pass for one of the Protean varieties of the Linnasan Bulla 

 fasciata ; but a comparison with that shell will at once point 

 out the strong specific difference that exists between them in the 

 formation of the mouth. In this, the lower half of the inner lip, 

 or more properly the pillar, is nearly straight ; the base entire, 

 or without any notch or truncated appearance : whereas in the 

 true A. fasciata, the inner lip at the base is very much curved 

 inward, and notched befoi'e it joins the outer lip. The mouth is 

 also short and broad : whereas in this it is much more oblong, 

 and the base round. Other more obvious characters exist in the 

 form of the whorls, spire, and more particularly in the colour, 

 of these two shells ; but these are in comparison of minor im- 

 portance. 



1 regret having but one example of this shell, as it prevents 

 mc from tracing how far the characters here detailed hold good 

 PL4i. 



