AMASTRA, LANAI. 237 



ture being similar. It seems most closely related to the forms 

 of A. nigra having rounded and striate embryonic whorls. 

 There is no related species known on Lanai, and were it not 

 for Mr. Thwing's acceptance of it as a Lanaian species, that 

 locality might be doubted. 



(Series of A. magna.) 



58. A. MAGNA (C. B. Adams). PL 26, figs. 1 to 6; pi. 39, figs. 

 4,8. 



" Shell thick, ovate^conic, elongate; blackish-brown at the 

 apex, reddish-brown on the middle whorls, and ash-colored on 

 the lower whorls; with unequal, irregular, very coarse, trans- 

 verse striae, with close-set transverse arcuate ribs near the 

 apex, and some indistinct raised spiral lines on the lower 

 part of the last whorl ; apex subacute ; spire rather long, with 

 the oulines quite curvilinear; whorls seven, rather convex, 

 with a well-impressed suture; last whorl obtusely angular; 

 aperture ovate, acute above, with an extremely thick deposit 

 on the inner side, with a very large compressed columellar 

 fold. 



Mean divergence 50; length 1.33 inch; breadth .7 inch; 

 length of aperture .61 inch. 



The unique specimen which has served for this description 

 is somewhat faded, and the lip probably is not quite mature, 

 being sharp " (Adams). 



Lanai (Newcomb, Gulick) ; behind Koele (Perkins). 



Achatinella magna C. B. ADAMS, Ann. Lye. N. H. of N. Y. 

 v, p. 41 (1850) ; Contrib. to Conch., no. 8, p. 125. NEWCOMB, 

 Ann. Lye. N. H. of N. Y. vi, 1858, p. 319 (animal). PFR., 

 Monographia iv, 542; vi, 177. NEWCOMB, Ann. Lye. N. H. 

 vi, p. 319. Amastra magna C. B. Ad., HARTMAN, Proc. A. N. 

 S. Phila., 1888, p. 47. SYKES, Fauna Hawaiiensis, p. 339. 

 BORCHERDING, Zoologica, xix, p. 106, pi. 10, f. 2. GULICK, 

 Evolution, Racial and Habitudinal, pi. 1, f. 19. Achatinella 

 baldwimi NEWCOMB, P. Z. S., 1853, p. 155, pi. 24, f. 72. 

 Achatinella gigantea NEWCOMB, P. Z. S., 1853, p. 136, pi. 22, 

 f. 17 (Haleakala, Maui). 



" Animal of inky-black above, veined with white, when ex- 



