NO. I ACHATINELLA APEXFULVA DIXON — WELCH 59 



A narrow shell (pi. 5, fig. 8a) measures: Length 18.2 mm., greater 

 diameter 11.8 mm., spire height 10.2 mm.; the shell is white except 

 for the first postembryonic whorl and a half which is lined with 

 ochraceous fawn and has the impressed sutural band ochraceous 

 tawny ; lip army brown. 



ACHATINELLA APEXFULVA OVUM var. 2 



Plate i, Figures 2-j, 28, 31 ; Plate 5, Figures 12-14 



Area 23 : North-South Halawa Ridge, locality 162D*, elevation 

 1,500-1,750 feet; 164D*, elevation 1,500-1,650 feet, 5 sinistral; 

 165D*, elevation 1,400-1,500 feet, 4 sinistral, all Meinecke-collected, 

 1930. Also collected probably in the region of areas 22 and 23 by 

 J. S. Emerson, BBM 102211, by Dos Santos, BBM 74314, Thurston, 

 BBM 130506, Wilder, BBAI 50523 (figs. 4. 4a, p. 53)- 



Area 24: Halawa-Kalauao Ridge, locality 174*, elevation 1,550 

 feet, 1930; 176-1, elevation 1,650 feet, 2 sinistral 1936; 176-2, eleva- 

 tion 1,700-1,750 feet, I sinistral 1936; 176*, elevation 1,650- 

 1,700 feet, I sinistral 1930 (figs. 4, 40, p. 53) all Meinecke-collected. 

 Aiea, J. S. Emerson, BBM 102446, 6 sinistral. 



The shells of areas 23 and 24 are characterized by having certain 

 yellow color patterns mixed with the usual A. a. ovum pattern of 

 area 22. 



The usual form of the shell in area 23 (pi. 5, fig. 12) measures: 

 Length 19.4 mm., greater diameter 13.0 mm., spire height 9.5 mm, ; 

 and has a color pattern similar to that of A. a. ovum (pi. i, fig. 26). 



A distinctive yellow color pattern (pi. i, fig. 27) has the embryonic 

 whorls white; first postembryonic whorl white, impressed sutural 

 band ochraceous tawny ; first half of the penultimate whorl white, im- 

 pressed sutural band light pinkish cinnamon, last half of penultimate 

 and last whorl naples yellow, banded at the edge of the periphery with 

 white, impressed sutural band color of ground; lip seal brown or 

 bone brown; columella callus fawn color. Length 19.5 mm., greater 

 diameter 12.8 mm., spire height 10.5 mm. 



In the Wilder lot (BBM 50523) of 30 shells, 50 percent are white 

 and resemble A. a. ovum (pi. i, fig. 26). The usual form of the shell 

 (pi. 5, fig. 13) measures: Length 20.1 mm., greater diameter 13.7 

 mm., spire height lo.o mm. Four shells in the lot have a yellow pattern 

 (pi. I, fig. 27), seven a yellow banded or lined pattern (pi. 5, fig. 11). 

 One of the yellow-banded shells, an elongate form, has unusually 

 dark bands (pi. i, fig. 28). The postembryonic whorls are ochraceous 

 tawny, finely or faintly lined with white, last whorl below the 



