328 ACHATINELLA APEXFULVA. 



narrow sutural margin whitish, the embryonic whorls ivory 

 yellow. The specimens from Ahonui and Kalaikoa are alike 

 in pattern. The original description follows. 



"Apex lilaceus Gk. Shell dextral, globose-conic, glossy, 

 striated with growth but hardly with spiral lines; lilac-fawn 

 colored, streaked with whitish ; suture margined with paler ; 

 whorls 6, the first three nearly flat, white, the rest convex; 

 last whorl sometimes obscurely, obtusely angular; aperture 

 whitish ; peristome dilute rose-brown, very little dilated, thick- 

 ened within ; columellar fold strong, pale rose. Length 21, 

 diam. 12^ mm. 



* ' Station : On trees. Habitat : The metropolis of the species 

 is Ahonui, on Oahu. It is also abundant in Kalaikoa, but be- 

 comes very rare in Wahiawa, Helemano and Kawailoa. Af- 

 finities : It is readily distinguished from A. apicatus Nwc. by 

 the color of the apex, which is chestnut in that species, but 

 white in this. Remarks : Sinistral specimens are very rare. 

 The specimen figured is from Kalaikoa' (Gulick). 



This form is fully connected with the gulickii pattern. 



A. a. apicata occurs on the Poamoho-Helemano ridge in sev- 

 eral forms, the shells either dextral or sinistral in the same 

 colonies. A lot in the Gulick collection labeled "Helemano' 

 contains shells with tawny suture, similar to pi. 60, figs. 4c, 

 others with narrowly white-margined suture (like pi. 60, 

 fig. 4&), and about half the lot has a wide white band below 

 the suture, like pi. 60, fig. 9. In all of these the streaks may 

 vary from walnut brown to slate blue, in various nuances. 



On the slope of a spur running into lower Poamoho, Mr. 

 Spalding collected typical apicata, chiefly with the suture 

 dark-bordered, but with them the form with broad white su- 

 tural band and white embryonic whorls ; the streaks slate-blue 

 (pi. 60, fig. 9, from no. 2102). 



Further up on the Helemano-Poamoho division ridge the 

 same form occurs. The streaks are more or less blended, color 

 varying from dull violet black to vinaceous drab. The su- 

 tural border is wide and snow-white ; embryonic whorls cinna- 

 mon to nearly white, pi. 60, figs. 8, 8a, coll. by Spalding. 

 These shells with a broad white sutural band are an incipient 

 race, in most places not extricated from the dark-sutured 



