154 AMASTRA, KAUAI. 



Kauai (Newcomb) : Hanalei ( Baldwin) ; Waiole (Gulick). 

 Type no. 1172 N. Y. State Museum at Albany. 



Achatinella nucleola GLD., Proc. Boston Soc. N. H., ii, p. 

 28 (Jan., 1845). PFR, Monogr., ii, p. 241; iii, 457; iv, 545; 

 vi, 178. Amastra nucleola Gld., BALDWIN, Catalogue, 1893, p. 

 9. SYKES, Fauna Hawaiiensis, p. 353, no. 93. GULICK, Evo- 

 lution, Racial and Habitudinal, p. 38, pi. 1, f. 2 (Waiole). 

 Achatinella, brevis PFR., Proc. Zool. Soc. Lond., 1845, p. 90 

 (1846). Monogr. Hel. Viv., iii, 458 ; vi, 181. 



A shell 3.5 mm. long of 2y 2 whorls shows the first I 1 /-} 

 whorls smooth, extremely fine, faint striae then appearing. 

 There is a well-developed axial lamella. In adults the spire 

 is more or less tinted with brown, the last whorl deepening 

 to dull purple; a band below the suture, a patch around the 

 small axial perforation and a wide stripe behind the lip being 

 pure white. The last whorl is irregularly, rather finely, 

 wrinkle-striate. The lip is obtuse and thickened a little 

 within. The contour varies somewhat. 



Length 11.9, diam. 6.9, length of aperture 5 mm. 



Length 10.7, diam. 6.9, length of aperture 4.9 mm. 



Length 11, diam. 6.1, length of aperture 4.8 mm. 



A. rugulosa is its nearest ally, but that is larger, more obese, 

 with a coarser surface and no subsutural white band. 



Though common in collections, all the specimens seen have 

 the appearance of having been collected dead. The speci- 

 mens figured are from Waiola, Gulick coll. W. H. Pease 

 states that he collected the veritable A. nucleola only at 

 Manoa, Oahu (Journal de Conchy liologie, 1870, p. 96), but 

 this locality has not been confirmed, and is apparently an 

 error. 



Harper Pease, followed by Mr. Sykes, places A. brevis Pfr. 

 as a synonym of A. nucleola. The description, given below, 

 is discrepant in the phrase "T. non rimata" and in color. 

 Only one shell in a large series of A. nucleola examined has 

 the axial 'crevice closed. It is almost invariably open, though 

 narrow and short, 



Achatinella brevis Pfr. Shell not rimate, ovate-conic, solid, 

 obliquely striatulate, glossy, reddish-brown. Spire convexly- 



