ACHATINELLA VALIDA. 337 



straightened, narrowly expanded; columellar margin thick, 

 adnate. Length 21, diam. llmm. ; aperture 10 mm. long, 4^ 

 wide. Inhabits the Sandwich Islands, Frick (P/r.). 



"Var. 6. Fulvous, radiated with brown, suture of the same 

 color" (P/r.). 



Oahu: Waialee (Gulick). 



Achatinella cinerosa PFR., Proc. Zool. Soc., 1855, p. 2, pi. 30, 

 f. 5; Malak. BL, 1855, p. 5 ; Monographia Hel. Viv., iv, 519. 

 [A. decora] var. cinerosa Pfr., SYKES, Fauna Hawaiiensis, p. 

 302. Apex leucozonus GULICK, P. Z. S., 1873, p. 83, pi. 10, 



f - 6 - y j ! 



This subspecies is like valida in the straightly conic shape, 

 white subsutural band and streaked coloring. It differs from 

 valida chiefly by the color of the embryonic shell, which varies 

 from ivory to light ochraceous buff with a white band below 

 the suture ; the tip white or a trifle grayish. The last two or 

 three whorls are cinnamon with snuff-brown to sepia streaks 

 (rarely walnut brown), in many specimens interrupted by a 

 white peripheral band; suture bordered with a white band. 

 Barely there are several or numerous bands, figs. 9, 14, illus- 

 trating these unusual patterns. In a few shells the streaks 

 coalesce, producing an even chocolate shade, with the usual 

 light peripheral and sutural bands. In a few specimens the 

 cuticle is yellow below the periphery (fig. 10). Some narrow 

 shells of this kind were erroneously identified by Gulick as 

 A. napus Pfr., but that is really a Waianae shell. In several 

 very old shells there is a strong cord across the parietal wall. 

 The color and shape variations are well connected by inter- 

 mediate shells, in the lot of 178 before me, even the yellow- 

 base form, which seems to be the only significant color-muta- 

 tion in the lot, connects by transitional shells with the others. 

 Gulick states that it is always dextral, but I found three sin- 

 istral shells by carefully looking over the lot in A. N. S. col- 

 lected by him. 



The ordinary size is length 19, diam. 11.7 mm., but it may 

 be smaller and narrower, length J.7.2, diam. 10.4 mm. 



The specimens from Wahiawa noted in Mr. Gulick 's re- 

 marks under A. leucozonus, belong, in our opinion, to A. 

 swiftii. 



