AMASTRA, MAUI. 



ovate, white; columella with a strong white plait; lip thick- 

 ened within, simple. Length 0.4, breadth 0.35 inch. [lOx 

 8.75 mm.] 



* ' Entire animal of a sooty black ; superior tentacles strongly 

 clubbed, lower ones with a light-colored tip, granulations 

 large; longer than the shell; motions very slow and timid " 

 (Newc.) . 



The shell is imperforate or rimate, globose with short, con- 

 cavely conic spire, rather thin, pale brownish under a dull 

 chestnut or umber cuticle which covers the surface except 

 in front of the aperture. 2~y 2 embryonic whorls convex; 

 finely striate, the last subangular and perforate. Later 

 whorls rather coarsely, irregularly wrinkled, the last whorl 

 rounded peripherally, more or less distinctly marked with 

 very shallow, rather coarse spiral striae. Aperture small, 

 oblique, white within. The outer lip has a narrow internal 

 rib. Columella white, short, bearing an obtuse lamella. 



Length 13, diam. 9.5 mm. ; 5~y 2 whorls. 



Length 10, diam. 7.2 mm. ; 5% whorls. 



Maui: Haleakala (Neweomb, type loc.) ; Makawao and 

 Kula (Baldwin). 



Achatinella obesa, NEWC., Ann. Lye. N. H. of N. Y., vi, 

 April, 1853, p. 24; t. c., p. 329; P. Z. S., Lond., 1853, p. 143, 

 pi. 23, f. 39. PFR V Monogr., iv, 543. BALDWIN, Catalogue, 

 1893, p. 9. Amastra heliciformis Anc., THWING, Occas. Pap. 

 B. P. B. Mus., iii, no. 1, pi. 3, f. 17. 



The type locality is rather indefinite, but it is known to 

 occur on the western (Kula) side of Haleakala. In the typi- 

 cal form (pi. 42, fig. 11, length 10.3, diam. 9 mm.) the spire 

 is short, either almost straightly conic or concavely conic, as 

 in the specimen figured. The last whorl is depressed. This 

 form occurs in Kula, where the shells are more or less plas- 

 tered with earth or excrement, which sometimes forms a peri- 

 pheral keel, somewhat as in A. agglutinans, but less copious. 



Specimens received from Mr. Baldwin, exact locality not 

 stated, have the last whorl much less depressed. See meas- 

 urements above and pi. 42, fig. 10 ; pi. 15, fig. 11. This high 

 form may possibly be segregated as a variety. The surface 



