ACHATINELLA LEUCORRAPHE. 305 



brown, with or without whitish spiral lines; sutural border 

 tawny, lip faintly pink. A small lot of 5 dextral, 4 sinistral 

 shells from Kipapa, in coll. Spalding, are in color like the 

 preceding colony. PL 59, fig. 13 is from no. 2328, on the ridge, 

 living on guava, and figs. 14 to 14& from no. 1906, lower, on 

 the slope into Waikakalaua. This form of irwini resembles 

 the neglecta (coniformis) pattern of A. swiftii, except in the 

 marking of the early whorls, which seems to be a more con- 

 stant character than the later pattern. It connects with the 

 irwini pattern from higher up, through several hybrid colo- 

 nies, as noted above. 



It remains to notice two rather aberrant forms from Mr. 

 Thaanum 's collection, possibly having relations with A. swiftii. 



PI. 59, figs. 15, 15a. A series from Mr. Thaanum labelled 

 "Waipio" (no doubt from somewhere in the lower Kipapa- 

 Waikakalaua ridge) consists of small dextral shells with com- 

 siderable cinnamon-rufous on the spire and below the last 

 suture, the last whorl or two more or less profusely banded 

 with black, the bands usually somewhat speckled. The apex 

 is marked as in leucorraphe, though often rather weakly. The 

 aperture is light Payne's gray within, the lip and columellar 

 fold lavender or fleshy with darker spots. Length 16 to 17 

 mm. 



This is a pure colony of quite distinct appearance. 



PI. 59, figs. 16 to 16&. A series of small dextral and sinistral 

 shells from "the rosea ridge" (I suppose the middle ridge of 

 Poamoho, or possibly the northern ridge of Waikakalaua), 

 from Mr. Thaanum, contains forms having much the appear- 

 ance of the tuberans pattern of A. swiftii, but differing by the 

 well developed, dark, apical spiral of leucorraphe. The pat- 

 tern consists of gray streaks and spiral bands, forming darker 

 squarish spots or short bars at the intersections. Sometimes 

 the bands predominate and are iron gray or blackish, separ- 

 ated by white lines or bands. Lip and columellar fold of a 

 lilac tint, interior bluish white. This form seems near to that 

 from the southeastern ravines of Waikakalaua. 



