PARTULINA, MAUI. 43 



expanded; the columellar fold white, compressed, nearly trans- 

 verse, and standing out very prominently. Length J-, breadth 

 iinch" (Gld.) 



East Maui: foot of Mt. Haleakala (U. S. Exped.); Makawao 

 (Baldwin): Kula (Gulick). 



Achati.nella marmorata GLD., Proc. Bost. Soc. N. H. ii, p. 

 200, March, 1847; Expedition shells p. 35; U. S. Exploring 

 Exped., Mollusca, p. 85, pL 7, figs. 94, 94a. PFR., Monogr. 

 iii, p. 455. NEWCOMB, Ann. Lye. N. H. of N. Y. vi, p. 311. 

 THWING, Reprint Orig. Descript. Achat. pi. 2, f. 13. Achati- 

 nella adamsi NEWCOMB, Ann. Lye. vi, p. 19 (May, 1853). 

 -A. adamsii NEWCOMB, P. Z. S. 1853, p. 137, pi. 22, f. 20. 



Perforate, dextral, rather solid, gray-brown, with scattered 

 white spots or irregular stripes dark-bordered on the left side. 

 Last embryonic whorl having wide, strongly protractive white 

 and brown stripes. Surface dull, without gloss, by reason of 

 the dense, microscopic, crinkled spiral strise. Gould's figure is 

 copied, fig. 1. 



Length 25, diam. 14.3, aperture 13 mm.; 6^- whorls. 



Length 21.2, diam. 13.3, aperture 11.3 mm.; 6 whorls. 



Length 21, diam. 12.2, aperture 11 mm.; 6^ whorls. 



Newcomb described the animal as "light pea green, strongly 

 granulated, one-third longer than the shell, tentacles light slate; 

 mantle and base of foot same color as the body." He included 

 as synomous: A. adamsi Newc., A. induta Gul., A. plumbea 

 Gul., A. ustulata Gul. Mr. Thwing states that "in over one 

 thousand examples only one sinistral specimen was found." 



11 A. adamsii. Shell dextral, conically acuminate, whorls 6, 

 finely striated transversely, roughly striated longitudinally; 

 suture deeply impressed, lip expanded, columella terminating 

 in a strong, abruptly twisted plait. Interior of shell of a leaden 

 blue color, exterior dark chestnut, irregularly mottled and 

 striped with white. Length 18, diam. 9-twentieths of an inch." 

 A. adamsii is terrestrial in its habits. 



19. P. PLUMBEA (Gulick). PI. 10, figs. 8 to 12. 



"Shell dextral, sometimes perforate, ovate-conic, solid, shin- 

 ing, irregularly striated, very finely decussated; lead-colored 



