VI 1 1. 



Section AMASTRA.— H. & A. Adams. 



/. SJicUs from OaJui. A. — Main mountain ridge. 



235. Achatinella tristis Ferussac. 



A. nii/i'i Fer. Rve. Couch. Icon. Achat., London, 1S50, pi. v, fig. 37. 



Shell globosely ovate, rather solid, dextral, spire short, acute 

 at the apex, whorls convex, columella arched, with a twisted plait; 

 j-ello wish-cream color or brownish, covered with a black fugacious 

 epidermis, apex brown-red. 



Hab. Nuuanu to Palolo. — Bald. 



336. Achatinella fuliginosa Gould. 



A.fiiligiiioia Gld. P. Boston Soc, ii, 184S, p. 28. 



T. imperforata, ventricoso-ovata, apice acuta, tenui, pallide viresceiite, 

 epidermidc nigricaiitc induta; anfr. 6, supra siibtabulatis, striis incrementi, 

 et striis volvcntibus incqualibus decussatis ; aperttira parva, semilunari; 

 latro simplici intus incrassato, faiice citrulescente; plica acuta. Long. 7-10, 

 lat. 2-5 poll. 



Shell imperforate, ventricose-ovate, apex acute, thin, pale 

 greenish, covered with a blackish epidermis; whorls 6, uearl}' flat, 

 unequally decussate with lines of growth and revolving striae; ap- 

 erture small, semilunate; lip simple, thickened wdthin, aperture 

 bluish; fold acute. 



Hab. Nuuanu to Palolo. — Bald. 



This shell is generally placed with A. tristis F^r. 



237. Achatinella ventulus Ferussac. 



A. vftilulus Rve. kve. Icon. Conch., London, 1H50, pi. iv, fijf. ;,i. 



Shell oblong, cylindrical, dextral, whorls flatly convex, very 

 finely impres.sed striated, columella short, arched, thinly twisted- 

 plaited: aperture small ; very dark brown, with a pale band be- 

 neath the sutures, covered with a slight epidermis, interior of aper- 

 ture bluish. 



( >4,1 ) 



