ACHATINELLA CURTA. 255 



Opaeula. Gulick found rhodoraphe, varying from a wide 

 to a linear sutural border. 



On the Opaeula-Kawaiholona division ridge Mr. Spalding 

 found curia with a black or purplish sutural band, and a few 

 white ones with yellow tint on at least part of the base. 



Kawaiholona. On the eastern spurs Mr. Spalding found 

 faintly streaked curta-undulata forms similar to pi. 46, fig. 9. 

 Along the bed of the stream a form was found with the char- 

 acters of the preceding intensified, intermediate between curia 

 and livida (pi. 46, fig. 10, coll. by Spalding). It has a rufous 

 or chestnut sutural line, followed by a white band, below 

 which it is streaked with Dutch blue or slate blue on a whitish 

 tint of the same, the base with a yellowish suffusion. There 

 is a slate-purple streak within the white lip-edge, and the 

 columellar fold is white. While the coloration of this colony 

 is much like livida, it connects with curia through forms found 

 eastward, as noted above. A brown form also occurs in the 

 same colony (no. 1612 of Mr. Spalding's collection). 



"Kawailoa.' Mr. Gulick found curia, rhodoraphe and 

 undulata patterns, the latter small, and varying to specimens 

 in which the tawny bands are diffused, producing an ochra- 

 ceous-tawny shell with indistinct dusky streaks (pi. 46, figs. 

 20 to 24). PL 46, figs. 16-19 are Kawailoa forms from 

 Thaanum. 



Kawaiiki. Above and at the Waialua Agricultural Com- 

 pany's intake, Mr. Spalding collected a series of beautiful 

 color-forms, illustrated in pi. 46, figs. 11 to 15. The follow- 

 ing color-forms occur, (a) Yellow, varying to white with the 

 base faint yellow, apical whorls often ochraceous. (6) yellow 

 with a pale tawny sutural line or a chestnut or blackish sutural 

 band, typical curia pattern, (c) yellow with two or three 

 chestnut-black bands, which may cover most of the surface. 

 (d) yellow, with diffuse chestnut streaks and sutural band, 

 or with deep chestnut streaks and sutural and peripheral 

 bands, approaching undulata. (e) Pale yellow with diffuse 

 serpentine green streaks and a chestnut sutural band, a dark 

 streak within the outer lip ; approaching livida. 



In the collection of Hon. L. A. Thurston there is a good 



