64 Original Dcscn'p/ioiis of Achatindla. 



CASTA GROUP. 



84. Achatinella casta Newcomb. 



A. casta Newc. P. Zool. Soc. IvOndon, 1853, p. 134, pi. xxii, fig. 12. 



Shell conically elongate, solid, polished, shining, dextral or 

 sinistral ; whorls 6, rounded, margined above ; aperture subovate, 

 rather small ; lip simple, thickened within ; columella short, with 

 a strong plaited brownish tooth ; colour white or yellow, with ex- 

 tremely variable transverse bands of black, brown, pink or white, 

 variously arranged. lyong. 13/20, lat. 6 1-2/20 poll. 



This species is readily distinguished from any yet described. 

 Its northern limit is the valley below Mouna Rua [.?/V] , and half a 

 dozen ravines, south, in the District of Ewa. — Newc. 



Hab. Ewa. — Newc. Halawa to Waipio. 



85. Achatinella pygmsea Smith. 



A. pygiiia-a Sin. P. Zool. Soc. London. 1S73, p. 75, pi. ix, fig. 11. 



Testa sinistrorsa, ovato-conica, nitida, incrementi lineis transversimque 

 exilissime striata, flavescens ; sutura Icviter niarginata ; anfract. 5 1-2, con- 

 vexi, primi 3 1-2 albi ; apertura alba ; perist. leviter limbatum ; plica colu- 

 mellaris mediocriter magna, rosea. Long. 14, diam. 8 mill. 



Var. Testa albida, linea supra zonaqne brunnea peripheriam infra cincta. 



Shell sinistral, ovately conic, shining, transversely very finely 

 striated with lines of growth, light yellow; suture lightly margined; 

 whorls 51-2, convex, first 31-2 white ; aperture white ; lip lightly 

 edged ; columellar fold moderately large, rose. 



Var. Shell whitish, encircled above the periphery by a brown 

 line and below by a brown band. 



Affinities. It is somewhat allied to A. casta Newc, but is 

 much smaller and heavier in proportion to its size. — Sm. 



Hab. Waipio. — Sm. 



86. Achatinella concolor Smith. 



A. conrulo)- 'nva. P. Zool. Soc. London, 1873, p. 75, pi. ix, fig. i. 



Testa sinistrorsa, ovato-conica, nitida, incrementi lineis et transversim 

 (anfract. primis 3 modo) striata, flava (dilute brunneo interdum strigata); 

 sutura distincte marginata ; anfract. 6, convexi, primi 3 albidi ; apertura 

 alba; perist. tenue; plica columellaris valida, rosea. Long. 19, diam. 10 mill. 



Shell sinistral, ovate-conic, shining, transversely striated on 

 the first 3 whorls only with lines of growth, yellow (sometimes 

 striped with pale brown); suture distin(5lly margined ; whorls 6, 



