316 AMASTBA, HAWAII. 



simple, well-impressed; striae numerous, longitudinal an< 

 well-developed. Aperture semiovate; lip simple; columella 

 short, with an oblique plaited tooth. Color of shell externally 

 of a uniform light reddish-yellow, internally white or pale 

 rose. Length 13, diam. six-twentieths of an inch " (Newc.). 



Hawaii (New-comb). Eastern Hawaii, from the northern 

 slope of Mauna Kea at Hamakua, to the eastern (Olaa) and 

 southeastern (Kau) slopes of Mauna Loa. Above Kukui- 

 haele; rare in the deposit at Manu, and common living at 

 about 2000 ft. ; Laupahoehoe Gulch, 800 ft, ; near Olaa, Puna 

 district (Henshaw). 



Ackatinella flavescens NEWC., P. Z. S., 1853, p. 151, pi. 24, 

 f. 62. PFR., Monogr., iv, 553. THWING, Occ. Pap., B. P. B. 

 Mus., iii, no. 1, p. 178. Amastm flavescens PSE., P. Z. S., 

 1869, p. 650. HENSHAW, Journal of Malacology, xi, p. 63. 

 Amastra saxicola BALDWIN, Nautilus, xvii, July, 1903, p. 34. 



The shell is imperforate or shortly rimate, with straightly 

 conic spire. The whorls are all convex, the embryonic 

 are glossy, almost smooth, marked with extremely faint, fine 

 growth-lines only. The last whorl is generally quite noti< 

 ably swollen below the suture. The thin cuticle is yellowisl 

 except on the last half of the last whorl where it becomes 

 chestnut, at least near the lip. On the spire the yellow tint 

 fades to white at the summit. Under the cuticle the shell is 

 white, or sometimes faintly ruddy. There is more or less lip- 

 rib, of a pink or flesh tint. The >columellar fold is strongly 

 oblique. Length 15.5, diam. 8.1 to 8.5, aperture 7.1 mm.; 

 6 whorls. Specimens from Newcomb. The largest of the lot 

 is 16.8 mm. long. Newcomb gives the length as 16.25 mm. 



The definite localities for flavescens given above are based 

 on specimens in U. S. Nat, Mus., collected by H. W. Henshaw. 

 Specimens from a lot from near Olaa (no. 172935) vary as 

 follows : 



Length 17.2, diam. 8, aperture 7.2 mm. 



Length 15.8, diam. 8.1, aperture 7.1 mm. 



Length 14, diam. 7.8, aperture 6.7 mm. 



