AMASTRA, MOLOKAI. 259 



70. A. NUBILOSA (Mighels). PL 27, figs. 8, 9, 10, 13. 



The shell is imperforate, oblong-conic, moderately strong, 

 lusterless; the apical whorls white, light-brown, or pink, the 

 rest cream-white, covered with a thin cuticle closely figured 

 with fine zigzag or v-like olive-brown marks and narrow 

 streaks, often coalescent behind the outer lip ; nude in front 

 of the aperture. Spire a little convexly conic, the penulti- 

 mate whorl bulging more or less. Second embryonic whorl 

 with sculpture of fine, close, curved striae ; next whorl having 

 the striae weak except near the suture. Later whorls marked 

 with low growth-wrinkles, stronger near the suture. Penul- 

 timate and last whorls strongly convex. Aperture white; 

 outer lip thin and acute, or in large shells, thickened within ; 

 columellar lamella strong. Parietal callus thin, white. 



Fig. 13. Length 16, diam. 9.5, aperture 8 mm.; whorls 6. 



Length 18, diam. 9.5, aperture 8 mm.; whorls 6%. 



Fig. 9. Length 19, diam. 11, aperture 9.3 mm. ; whorls 6%. 



Fig. 10. Length 22.3, diam. 11, aperture 10 mm. ; whorls 7. 



" Animal tessellated black and gray (when in motion), 

 tentacles deep black, bottom of foot and mantle dark brown " 

 (Newcomb, Ann. Lye., vi, 312). 



Molokai : Kalae, Kaohu, Kahanui and Makolelau, all in the 

 central part of the island (Meyer). 



Achatinella nubilosa MIGHELS, Proc. Boston Soc. Nat. Hist., 

 ii, 1845, p. 20. REEVE, Conch. Icon., vi, pi. 1, f. 1. GLD., 

 U. S. Expl. Exped., Moll., p. 86, pi. 7, f. 95. PFR., Monogr., 

 ii, 236 ; iii, 459 ; iv, 552 ; vi. 180 ; viii, 240. NEWCOMB, Ann. 

 Lye. Nat, Hist, of N. Y., vi, p. 312 (living animal) .BALD- 

 WIN, Catalogue, p. 9. THWING, Orig. Descriptions, p. 162, 

 pi. 3, f. 21. Amastra nubilosa Migh., SYKES, Fauna Hawaii- 

 ensis, p. 341. BORCHERDESTG, Zoologica, xix, 107, pi. 10, figs. 

 3-5 -(1906). 



This species is somewhat like A. assimUis Newc., of Maui, 

 but it differs by the much finer sculpture of the embryonic 

 whorls. A. violacea differs from the Lanaian A. magna in the 

 same way. We cannot agree with Borcherding's union of 

 these forms. 



