103 



nearly rectilinear, except near the apex : whorls nearly nine, mode- 

 rately convex, with a well impressed suture : aperture broadly ovate ; 

 labrum not advanced along the middle, much reflected in the lower 

 half: columella moderately produced, nearly straight, well trun- 

 cated. 



Mean divergence about 20^ ; length of spire .65 inch ; total length 

 .86 inch ; breadth .27 inch. 



AcHATiNA NiTiDA. Shell well elongated, ovate-fusiform : reddish 

 brown, with very dark brown transverse stripes, about four or five on 

 each whorl : varicose coincidently with the brown stripes, the va- 

 rices being indicated by the thickening of the shell within, and a 

 deeply impressed line in front of each; well polished and shining : 

 apex subacute : spire with the outlines rectilinear, or moderately 

 convex : whorls seven to eight, moderately convex, with a well im- 

 pressed suture : aperture long ovate, very acute above : labrum sharp, 

 subangular at two-thirds of the distance from its upper extremity : 

 columella much curved, broadly truncated. 



Mean divergence 30° to 35° ; length .96 inch ; greatest breadth 

 .31 inch; least breadth .3 inch ; length of aperture .44 inch. 



AcHATiNA Gayana. Shell well elongated ovate-fusiform : light 

 brownish yellow, with a series of very distant triangular spots of dark 

 brown, descending from the suture, about five or six on each whorl : 

 varicose coincidently with the brown spots, the varices beinw rather 

 feebly indicated, as in A. nitida ; with fine regular rather crowded 

 transverse striae : apex subacute : spire with the outlines a little con- 

 vex : whorls seven or eight, rather convex, with a well impressed su- 

 ture : aperture long ovate, acute above : labrum sharp and thin : col- 

 umella nearly straight, rather narrow and obliquely truncated. 



Mean divergence about 30° ; length .76 inch ; greatest breadth .27 

 inch ; least breadth .25 inch ; length of aperture .36 inch. 



This rare and elegant species is dedicated to my assistant, Mr. A. 

 M. Gay, in testimony of his industry and rapid acquisitions in natural 

 history. 



Achatina similis. Shell similar to A. nemorensis , but the out- 

 lines of the spire are nearly rectilinear, and consequently the spire is 

 more slender ; the surface is highly polished, and has but a iew ex- 

 cesaively fine transverse strite ; the brown stripes are wider. It also 



