AMASTRA, OAHU. 213 



Oahu : Mt. Kaala, Waianae range, very local (Baldwin). 



Amastra tenuispira BALDW., Proc. A. N. S. Phila., 1895, p, 

 232, pi. 11, f. 51. 



Figured from the types. This species very closely resem- 

 bles the whitish race of A. micans, but fthe surface is 

 rougher and the color of the aperture differs. It is also a 

 little more slender, the whorls are slightly more convex, and 

 the axis imperforate. 



The shell is very thick. Last whorl white or pale buff, 

 more or less pink-tinted towards the termination ; spire gray 

 or brownish, the embryonic whorls dark brown. There are 

 small spots and shreds of a brown outer cuticle on the last 

 whorl. There is sometimes an impressed line below the suture 

 on the last whorls. The whole interior is pink-tinted, or some- 

 times nearly white, and there is a low, more oblique fold 

 above the usual columellar plait, more prominent in some 

 specimens than in others. 



Length 15.2, diam. 6.5, aperture 6 mm. ; 6^/2 whorls. 



Length 16, diam. 6.9, aperture 6 mm. ; 6% whorls. 



47. A. TURRITELLA (Ferussac). PI. 35, figs. 1 to 4. 



"Shell dextral, elongate, conic, striatulate ; whorls 6; apex 

 obtuse; suture distinct, not duplicate; aperture strongly ob- 

 long ; peristome thickened within ; columella perforate, nearly 

 straight, provided with a distinct rib. Sandwich Is." (Fer.). 



Oahu, southern valleys of eastern half of the main range : 

 Waialae, Palolo, Matiti, Nuuanu, Moanalua, Halawa, Aeia, a 

 variety at Waiawa. 



Helix turritelld Fer. (Prodr., Tabl. Syst. no. 434, nude 

 name), Voy. autour du Monde de 1'Uranie et la Physicienne, 

 Zoologie, p. 481 (1824) ; Hist., pi. 155, f. 13. SOULEYET, Voy. 

 Bonite, Moll., pi. 29, f. 7, 8. Achatinella t., REEVE, Conch. 

 Icon., vi, pi. 5, f. 34, 41. PFR., Monogr., ii, 233; Conchyl. 

 Cab., p. 285, pi. 67, f. 18, 19. NEWCOMB, Ann. Lye. N. H. of 

 N. Y., vi, p. 307 (animal) .Amastra t., PEASE, P. Z. S., 1869, 

 p. 650. SYKES, Fauna Hawaiiensis, Moll., p. 346. GULICK, 

 Evolution, Racial and Habitudinal, p. 39, pi. 1, f. 17 (Palolo). 

 Acliatina oahuensis GREEN, Contrib. Maclurian Lye. to the 



