34 SMITHSONIAN iMlSCELLAXEOUS COLLECTIONS VOL. IO3 



ACHATINELLA APEXFULVA SIMULATOR Pilsbry and Cooke 



Plate i, Figure 6; Plate 4, Figures 12-130 



Acliatmclla ccitus color form simulator Pilsbry and Cooke, Man. Conch., 

 vol. 22, p. 287, pi. 55, figs. 2, 3, 4, 1914. 



The holotype of A. a. simulator selected by Pilsbry and myself is 

 figured in the Manual of Conchology (pi. 55, fig. 2) and illustrated 

 in this paper on plate 4, figure 12. The postembryonic whorls are 

 white lined with chocolate except for a line of pecan brown on the 

 last whorl below the suture; sutural band white. Length 17.8 mm., 

 greater diameter 12.2 mm., number of whorls 6. 



Distribution, area?: Palolo, Gulick. Pilsbry (Pilsbry and Cooke, 

 1912-1914, p. 287), says: "A small lot,- No. 42 coll. Irwin Spalding, 

 consists of dextral shells which occurred with the typical color form 

 of cestus." This form is not typical simulator but is what I consider 

 to be A. a. simulator var. i. Typical simulator is a lowland race now- 

 extinct. 



The color pattern of the holotype is a rare one occurring on only 

 one specimen in the Gulick lots in the Bishop Museum. The usual 

 color pattern and form of the shell (pi. i, fig. 6) has white postem- 

 bryonic whorls, lined on the last whorl with pinkish cinnamon, about 

 the base a band of cinnamon ; lip pale cinnamon pink slightly corru- 

 gated or roughened. Length 17.4 mm., greater diameter 11.5 mm., 

 spire height 9.2 mm., number of whorls 6. 



The shell may be more obese (pi. 4, fig. 13), length 17.2 mm., 

 greater diameter 12.3 mm., spire height 8.5 mm., last whorl lined 

 with cinnamon about the periphery, and army brown about the base. 

 Dextral forms were also found by Gulick. A dextral specimen 

 is figured on plate 4, figure 130. 



ACHATINELLA APEXFULVA SIMULATOR var. i 

 Plate i, Figure 7 



Area 4: Waiomao Stream, Palolo, locality 62, elevation 1,250- 

 1,350 feet, Meinecke, 8 dextral 1933, and 13 dextral 1914 (figs. 3, 3a, 

 p. 29). 



The shell is very close to A. a. simulator and dift'ers only in the 

 arrangement of the bands. Typical A. a. simulator always has a line 

 or band at the edge of the periphery, and the bands and lines are 

 never broken by axial streaks of a lighter color. The typical form of 

 this variety (pi. i, fig. 7) has white posteml)ryonic whorls, last 

 whorl above the periphery with a faint band of tilleul buff, below the 

 periphery the last whorl banded with mikado brown, which bands 



