56 Original Descriptions of Achatiyiella. 



species. It is much smaller than the former and rather larger than 

 the latter, and differs from them both in the arrangement of the 

 colors. Transition forms between it and both of them are numer- 

 ous. An item of specific value is the difference in the exterior 

 appearance and color of the animals. — Bald. 



Hab. Nuuanu Valley. — Bald. 



This shell forms a connecfling link between this group and 

 the colorata group. 



BELLULA GROUP. 

 ^ 71. Achatinella bellula Smith. 



A. hellula Sni. P. Zool. Soc. London, 1S73, p. 77, pi. ix., fig. 8. 



Testa dextrorsa, elongato-siibconica, imperforata, nitida, incrementi 

 lineis levissime striata, dilute castanea (spira pallidiore) saturatius strigata 

 lineisque paucis siibcastaneisobsoletis et zona fere nigra (interdumdeficiente) 

 infra peripheriam cincta ; anfract. 6 1-2, parum convexi ; sutura leviter cas- 

 taneo marginata ; apertura brevis, longitudinis 2-5 ^quans, intus alba ; 

 perist. margine tenue, intus leviter incrassatum ; plica colvimellaris sub- 

 valida, purpurea. Long. 20, diam. 10 mill. 



Shell dextral, elongate-subconic, imperforate, shining, very 

 lightly striated with lines of growth, light chestnut (spire paler) 

 more darkly striped and surrounded by a few obsolete chestnut- 

 like lines and an almost black band (sometimes absent) below 

 the periphery; whorls 6 1-2, hardl}- convex ; suture lightly mar- 

 gined with chestnut ; aperture short, equal to 2-5 the length, white 

 within ; margin of the lip thin, lightly thickened within ; columel- 

 lar fold quite strong, purplish. 



Hab. Pauoa and Nuuanu. 



A great variety of color markings are found in this species, 

 among which are the following : 



Var. A. Reddish brown, without bands or lines. 



Var. B. White with one black band on the last whorl. 



Var. C. Pure white. 



Var. E. A yellowish-white shell with several black bauds, 

 approaching A. mtdtizonata Bald. 



Var. F. Yellowish color with no bands. 



Var. G. Shell white with brown bands. 



72. Achatinella ligata Smith. 



A. lii(ala Sm. P. Zool. Soc. London, 1S73, p. 76, pi. ix, figs. 12, 13. 



Testa dextrorsa (vel sinistrorsa) elongato-ovato-subconica, mediocriter 

 nitida, incrementi lineis transversimque minutissime striata, albida, luteo- 

 olivaceo plusve minusve strigata, zonis plerumque duabus pallido-fuscis 



