V. 



Section LAMINBI/I/A Pfeiffer. 



Shells from OaJiu. 



GRAVIDA GROUP. 

 201. Achatinella gravida Ferussac. 



A. gravida Fer. Deshayes Hist. Moll., ii, p. 192, pi. civ, figs. 3, 4. 



A. testa sinistrorsa, inflata; spira conica, acuta; epidermide brunneo- 

 fugaci; anfractibus 5 1-2, suturis non duplicatis; apertura semilunata, alba ; 

 peristomate intiis incrassato; columtlla alba costa distincta unita; rima um- 

 bilicali. 



Shell sinistral, inflated; spire conic, actite; with a brown de- 

 ciduous epidermis; whorls 5 1-2, with the suture not duplicate; 

 aperture almost lunate, white; lip thickened within; columella 

 with a single distinct white rib; subperforate. 



The suffiisa Rve. is a roseate variety with the epidermis re- 

 moved. This occasionall}- occurs while the animal still inhabits 

 the shell. In the Imperial Museum the original type of Ferussac 

 is preserved, with a specimen of A. straminea Rve. as a variety, 

 on the same tablet. — Newc. (Ann. Lye. New York, vi, p. 307.) 



Hab. Niu to Kalihi. 



202. Achatinella dimondi Adams. 



A. dinuindi Adams. Ann. Lye. New York, v, 1S52, p. 42. 



vShell reversed, thick, long ovate-conic; dingy white or very 

 pale yellowish brown, with a blackish margin to the aperture when 

 mature; with a greenish black fugacious epidermis; with trans- 

 verse striae rather slight, very unequal and irregular, without 

 spiral striae; apex subacute; spire rather long, with the outlines 

 moderately curvilinear; whorls nearly 7, quite convex, with the 

 suture well impressed; last whorl often somewhat flattened on the 



