PARTULINA, MAUI. 55 



narrow brown spiral band on the periphery of the last whorl; 

 with very unequal and irregular transverse strise and numerous 

 excessively minute, wrinkled spiral impressed lines. Apex sub- 

 acute; spire elongate, with the outlines a little curvilinear. 

 Whorls nearly 7, moderately convex and more or less sub- 

 angular, margined above, with a well-impressed suture. Aper- 

 ture ovate; lip well thickened within the margin, expanded 

 much anteriorly, but not above; columellar fold strong. Mean 

 divergence 43 degrees. Length 1.06, breadth .55 inch; length 

 of aperture .44 inch. Length 26 J, diam. 13f, aperture 11 mm. 



"Var. dubiosa differs in being a little more ventricose; its 

 whorls are not margined above, and the brown stripe is replaced 

 by two fine paler brown lines, below which one or two other 

 yet finer lines may be seen. 



" Sandwich Islands. 



' ' This beautiful species is named in honor of Hon. Benjamin 

 Tappan, of Ohio." (C. B. Ad.) 



W. Maui: Wailuku (Gulick); Lahaina (Gulick, Baldwin). 



Achatinella tappaniana C. B. Ad. , Ann. Lye. N. H. of N. Y. , 

 v, p. 42, 1851; Contrib. to Conch., no. 8, p. 126. PFR., 

 Monogr., iii, p. 462. SYKES, Fauna Hawaiiensis, p. 318. 

 BALDWIN, Catalogue, p. 7, 1893. THWING, Reprint Orig. De- 

 script. Achat., pi. 2, f. 19. 



This well-known shell has a long, noticeably concave-sided 

 spire, margined suture, and one narrow brown band just below 

 the periphery, so that it enters the aperture below the insertion 

 of the outer lip. There are 3J embryonic whorls, of a whitish 

 tint, the last half whorl in young or very fresh examples usually 

 showing protractive yellowish stripes. Young shells are covered 

 with a yellow cuticle which is deciduous, disappearing in the 

 adult stage. The surface is rather dull, under the lens showing 

 spiral impressed lines and weak decurrent striation. The young 

 and half grown shells are rather acutely angular at the peri- 

 phery in front of the aperture. Wailuku is here selected as the 

 type locality (pi. 12, fig. 1). Length 24, diam. 12 mm.; 7 

 whorls. 



Kahoma specimens are somewhat stouter, length 25, diam. 

 14 mm. ; 6J whorls. They have one band or none, and one 



