100 HELIX-EUHADRA. 



what reflexed, flesh-colored ; the columellar margin a little dilated, 

 impinging a trifle upon the umbilicus. 



Alt. 19, greater diam. 34 mill. 



Alt. 20, greater diam. 39 mill. 



Alt. 18J, greater diam. 30 mill. 



Yeddo, Yokohama, Simoda, Mososaki, etc., Japan. 



H. Japonica FER. mss. Histoire, t. 69 H, f. 5, 6. DESK. Ibid., in 

 text, i, p. 58 (about 1850). H. peliomphala PFR. Zeitschr. f. Mai. 

 1850, p. 150; Monographia iii, p. 233. MARTENS, Mai. Blatter vii, 

 1860, p. 35 ; Ostas. Conch., p. 25, 1. 15, f. 1-5. H. Simodce var. JAY 

 in Narrative of Perry's Exped. ii, t. 5, f. 4, 5, 6. 



This is a protean species, very variable in size, width of the um- 

 bilicus and coloration. The ground-color is usually buff, but often 

 a paler straw-color, or tinged with reddish. Some examples are of 

 a light tint all over, two before me entirely lacking bands or umbil- 

 ical spot. The bands when all present number 5 ; the first very 

 narrow bordering the suture ; the second and third are above the 

 periphery ; the fourth is wider and below the periphery ; the fifth 

 occupies the interior of the umbilicus. The most constant of these 

 bands are the 3d, 4th and 5th. The 2d, when present, is generally 

 narrow. The bands above the periphery are generally crossed by 

 opaque whitish or buff streaks, or have light flecks upon them ; and 

 sometimes these streaks so break the color-pattern that forms like 

 H. brandti are produced. Only one of the banded specimens before 

 me lacks the umbilical brown tract. 



The number of described forms of this group which will be found 

 to be connected by series of intermediate varieties, still remains an 

 open question. Possibly H. amalice on one hand and senckenber- 

 giana on the other mark the extremes of a continuous series which 

 includes nipponensis, congenita, callizona, nimbosa, brandti, etc. 

 Compare Kobelt's remarks in Jahrbiicher D. M. Gesellsch. 1876, p. 

 32, and von Martens in the same volume, p. 357. 



Var. LUCHUANA Sowerby. PI. 30, figs. 14, 15, 16. 



Shell a little larger, umbilicus somewhat narrowed, less abruptly 

 excavated ; whorls a little more convex ; brown, with a single pe- 

 ripheral band, peristome violaceous. Alt. 22, greater diam. 38, less- 

 er 3H mill. (Mart.} 



Southern Japan, island ofKiusiu; Dagelet Id.; in the neighbor- 

 hood of Nagasaki ; Liu-kiu Is. 



