286 ACHATINELLA CESTUS. 



Waiawa, and I suspect that there is an error in the locality. 

 Mr. Thwing gives pulchella an eastern range as far as Halawa. 

 In this direction the separation from lorata would become 

 increasingly difficult. 



32. A. CESTUS Newcomb. PL 29, fig. 8; pi. 52, figs. 12-14a; 

 pi. 55, fig. 1. 



"Shell solid, ventricose, sinistral or dextral, pointed at the 

 summit; whorls 6, rounded, corded above, last one tumid; 

 aperture subovate; columella short, strongly tuberculate; lip 

 slightly expanded, thickened within. Color of tip black, 

 second and third whorls white, three last white, yellowish or 

 black or mixed, with a white cincture traversing the sutures 

 and cutting the body whorl below the center, with or without 

 a broader band below, sometimes with blotches or tessellations 

 of black and white or longitudinal undulating lines of the 

 same colors. Columella chestnut; lip same color, interrupted 

 with white. Length 14, width 8 twentieths of an inch. 



"A fine shell, approaching A. similans of Reeve, which it 

 resembles in form, but strikingly differs in markings" 

 (Newcomb). 



Oahu : Palolo (Newcomb) . Western ridge of Palolo to Niu. 



Achatinella cestus NEWCOMB, P. Z. S. 1853, p. 132, pi. 22, 

 f . 8 ; Monographia iv, p. 529, as var. of simulans. SYKES, 

 Fauna Hawaiiensis p. 300 (in part). THWING, Original 

 Descript. etc., p. 13, pi. 1, f. 1. 



Achatinella forbesiana PFR., P. Z. S. 1855, p. 5, pi. 30, f . 16 ; 

 Monographia iv, 529. THWING, Original Descript. etc., p. 20, 

 not pi. 1, f. 5. B[ulimella] forbsiana Pfr., HARTMAN, Proc. 

 A. N. S. P., 1888, p. 29. 



A. cestus was ill-received by European writers. Pfeiffer con- 

 sidered it a variety of A. simulans. Sykes unites with it, as 

 varieties or synomyms, some eight described forms from the 

 Ewa region westward. Hawaiian students Newcomb, Gulick 

 and the modern collectors hold cestus distinct from all of 

 these. We fully agree with the latter view. The range of 

 cestus is widely separated from the similarly marked western 

 forms. There is also a hiatus between the areas of cestus and 



