126 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



The usual form of the shell and the form and color pattern of the 

 embryonic whorls are close to A. a. irwini. The usual color pattern 

 of the postembryonic whorls is almost identical with the color pattern 

 of the holotype of A. a. czvaensis. The two forms of A. a. ewaensis 

 are separable because this form does not have a yellow band on the 

 embryonic whorls and has a dififerent range of color patterns. 



The usual form (pi. 2, fig. 30) and color pattern on 50 percent of 

 the sinistral shells has the embryonic whorls bicolored, first two 

 embryonic whorls white, banded on the lower third of the whorl with 

 fuscous; postembryonic whorls white faintly tinted with pale gull 

 gray, last whorl banded and lined with seal brown ; lip and columella 

 callus pale grayish vinaceous. Length 18.5 mm., greater diameter 

 12.6 mm., spire height 9.0 mm. A variation of the usual form is a 

 broad banded color pattern (pi. 8, fig, 15) with the same color as 

 plate 2, figure 30. Eighteen percent of the sinistrals have a white 

 color pattern tinted with gray similar to plate 8, figure 6a. Twelve 

 percent may have olive bufif or yellow lines similar to A. a. ii'wini 

 mixed with the usual pattern. 



The usual form of a dextral (pi. 8, fig. 150) and color pattern on 

 50 percent of the dextral shells has the postembryonic whorls white, 

 last whorl faintly lined at the edge of the periphery with pale gull 

 gray, base lined with seal brown. Length 18.2 mm., greater diameter 

 12.5 mm., spire height 9.3 mm. Twenty-two percent have the banded 

 pattern of plate 8, figure 15, 11 percent have a white pattern similar 

 to plate 8, figure 6a. Seventeen percent have an unusual dark banded 

 pattern (pi. 8, fig. 15/7) ; last two postembryonic whorls dark livid 

 brown banded with pale vinaceous fawn, the bands lined with wood 

 brown or vinaceous bufl^. 



The dextrals do not contain any forms with olive bufl: or yellow 

 in them similar to A. a. invini. For this reason I believe the dextrals 

 probably came from a higher locality than the sinistrals and prob- 

 ably occur as a pure race of dextrals. The sinistrals may also occur 

 as a pure white banded race without any olive bufif or yellow lines on 

 the shell. This section of the North-South Kaukonahua Ridge is not 

 well known and should be carefully collected again. 



Group of A. a. coniformis Gulick 

 ACHATINELLA APEXFULVA CONIFORMIS Gulick 



Plate 2, Figure 34; Plate 9, Figures i8-2oa 



Apex coniformis Gulick, Froc. Zool. Soc. London, 1873, p. 80, pi. 9, fig. 17. 

 Achatiuella su'iftii Newcomb, Pilsbry and Cooke, Man. Conch., vol. 22, pp. 306, 



308, 309, 312, pi. 58, figs. 2, 20, 7; pi. 59, figs, la, lb, 2(?) ; pi. 60, fig. io« 



(only), 1914. 



