Original Descriptions of Achatinella. 25 



3-4 convcxiusculi, cieteri convexi ; apertura recedens, alba ; pcrist. dilatatuin, 

 intus incrassatum ; plica columellaris valida, alba. Long. 19, diam. 12 mill. 



Var. A. Te.sta olivaceo-fusco strigata, zonis 1-3 albis interrupta ; suliira 

 albo marginata. 



Var. B. Testa ccrvina vel nigro vcl fusco strigala ad ]>criphcriaiii zona 

 lata alba intcrrupta ; sutura albo marginata. 



Shell sinistral, perforated, globosely couical, shiniug, striated 

 with lines of growth and indistinct spiral lines, white, encircled 

 with a few olive-brown bands : stiture margined ; spire hardly con- 

 cave ; whorls 6, the first blacki.sh, first 3-4 slightly convex, the 

 others convex, aperture receding, white: lip expanded, thickened 

 within : columellar fold strong, white. 



Affinities. It is related to A. dcrorus Fer. (syn. . I. pe /versus 

 Swain.), which is found in Helemauo and Kawailoa. It is distin- 

 guished by its smaller size, its concavely conical spire and its paler 

 colotir, which is differently distributed. The three upper whorls of 

 A. dccorus are of a yellowish tinge ; in this species they are white, 

 terminated with a black dot, which is not found in the typical 

 forms of the other species. — Gk. 



Hab. Wahiawa ; rarely in Helemano. — Gk. 



This species is never dextral. 



LUGUBRIS GROUP. 

 26. Achatinella lugiibris Chemnitz. 



Tuibo liigiibi is Chem. Conch. Cab., xi. 1795, p. 278; pi. ccix, figs. 2059. 2060. 



Testa dextrorsa, trochiformis. polita. nitida, argute striata ; anfractibus 

 5, primoribus conicis, attenuatis, ultimo gibbo, ventricoso ; suturis apice non 

 duplica'tis, reliquis niarginatis, linea distinctis adnata ; colore nigro a])ice 

 albido luteo ; apertura intus alba, semilunata ; peristoniate intus incrassato ; 



columella clausa. ( Quoy et Gaimard, \'oyage I'ranie et Physicicnne, 



P- 479- ) 



vShell dextral, trochiform, polished, shining, distintftlx striated; 

 whorls 5, the upper conical, attenuated, the last gibbous, ventri- 

 cose ; suture not duplicate on the apex, the rest margined ; color 

 black, yellowish white at the apex ; aperture white within, semi- 

 lunate ; peri.stome thickened within ; imperforate. 



A . lufTubris was first de.scribed as Turbo apex fulva by Caj^tain 

 George Dixon in the narrative of his Voyage Rouudithe World 

 (London. 17M9), p. 354, in which he says: "At the same islands 

 (Hawaiian) are great plent\ of }>eautiful slu-lls, sucli as Cyprira 

 Tip;rina, Mauritiaua, 7'alpa, and others of that genus: and num- 

 berless species of the smaller kinds, of which last the natives form 



