332 ACHATINELLA DECORA. 



99, pi. 99, f. 2. NEWCOMB, Ann. Lye. Nat. Hist, of N. Y., vi, 

 1858, p. 309 (animal). THWING, Orig. Descript. Achatinella, 

 pi. 1, f. 8. Achatinella quernea FRICK in coll., according to 

 J. S. Emerson. Apex tumefactus GULICK, P. Z. S., 1873, p. 

 82, pi. 9, f. 20. 



The shells obtained by Gulick and Newcomb are more var- 

 iable in shape than those found now. It seems to have been a 

 common species sixty years ago. PL 61, figs. 1 to 2e represent 

 specimens from the Gulick collection from ' * Kawailoa, ' ' which 

 we take to be the type locality. Whether this form with wide 

 sutural band still exists there is not known. Probably the 

 species ranged farther southeastward in the old days when 

 Gulick obtained his "Wahiawa" lot than it does at present. 



Mr. Spalding's several localities are near together, or pos- 

 sibly parts of one or two colonies, in the back Kawailoa-Hele- 

 mano country. 



The shells are rather long, often subperforate, the lip very 

 pale, ground color light buff (or sometimes ochraceous buff) 

 with faint or distinct darker streaks, which are usually 

 straight, sometimes beautifully zigzag. There are dark bands 

 in some lots. The white sutural band is narrow or reduced to 

 a line, rarely even wanting. See pi. 61, figs. 4, 4a, gulch west 

 of Helemano ; figs. 5 to 5&, eastern spurs of Kawaiholona ; fig. 

 6, gulch east of Opaeula, where also banded shells occur. 



Further east, in "Wahiawa", though just where is uncer- 

 tain, the species becomes somewhat smaller and distinctly 

 though minutely dark-tipped, the apex being lead color or 

 vinaceous gray. The shell varies from usual decora patterns 

 to white with brown bands below the suture, at the periphery 

 and around the columella. Mr. Gulick selected one of the ex- 

 tremely light shells as his type of A. tumefactus, but in the 

 large series of his collection this very light form is unusual. 

 It connects with the ordinary dark pattern through many in- 

 termediate stages, some of which are figured, all from one lot 

 from "Wahiawa." PL 62, figs. 12 to 20; fig. 18 being the 

 typical form of tumefactus. 



Length 18.6, diam. 12 mm. 



Length 16.5, diam. 11.2 mm. 



