AMASTRA, OAHU. 183 



a very strong but thin subhorizontal lamella. Parietal callus 

 thin. Length 16.7, diam. 8, length of aperture 6.5 mm.; 7 

 whorls. 



Oahu: Moanalua ( Irwin Spalding) . 



This species has the coloration and texture of A. reticulata, 

 but is notable for its slender contour, rather narrow summit 

 and small aperture. The pattern will probably be found 

 variable, as in allied species. Type to be deposited in the 

 Bishop Museum; collected by Mr. Irwin Spalding and re- 

 ceived through Dr. C. Montague Cooke, whose name the 

 species bears. 



27. A. TRANSVERSALIS (Pfeiffer). PL 31, figs. 2, 3, 4, 5. 



"Shell subrimate, ovate-conic, solid, closely striate, some- 

 what decussated with distant, spiral, impressed lines; black- 

 ish-red, covered with a tawny-gray epidermis interrupted in 

 spots and bands. Spire inflated- conic, acute. Whorls 6, 

 slightly convex, the last two-fifths the total length. Aperture 

 a little oblique, sinuate-oval. Columellar fold lamelliform, 

 subbasal, almost transverse. Peristome unexpanded, whitish 

 within or delicately lipped with rose. Length 12, diam. 6, 

 aperture 5y 3 x3 mm." (Pfr.) . 



Oahu (Frick, in Cuming coll.). Southeastern end of the 

 main range in Keawaawa (Baldwin, Gulick), and Kuliouou 

 valleys (Gulick). 



Achatinella transversalis PFR., P. Z. S. London, 1855, p. 

 204; Monographia Hel. Viv., iv, 551. 



The embryonic whorls are dark red-brown, very densely 

 and finely striate vertically, and after the first whorl are de- 

 cussated with very fine spiral lines. The last whorl has irreg- 

 ular vertical striae, cut by incised spirals, which may be deep, 

 strong and numerous or few and weak, sometimes so lightly 

 marked that mere vestiges may be traced with difficulty. The 

 ground-color is a rich dark red-brown, more or less covered 

 by the whitish tracery which is wonderfully varied in pat- 

 tern. Rarely the ground is a very light tint of brown, on 

 which the creamy markings show but faintly. The interior is 

 ordinarily dark flesh-colored, with a wide and moderately 



