108 HELIX-EUHADRA. 



H. QUJSSITA Deshayes. PI. 29, figs. 11, 12, 13. 



Shell sinistral, umbilicated, rather thin and light, straw-yellow, 

 encircled by a chestnut baud at the periphery and inside the umbili- 

 cus ; rarely unicolored. 



The shell has a deeply penetrating narrow umbilicus which 

 expands and is somewhat funnel-shaped at its opening. It is some- 

 what shining, opaque ; the surface marked by rather strong growth- 

 stride, generally a little malleated in places, and showing under a 

 strong lens excessively close, fine spiral striae all over except upon 

 the inner two whorls. Spire low-conoidal ; apex obtuse, polished. 

 Whorls 5|, convex, the last wide, a little descending in front, inflated 

 on the base ; aperture oblique, broad-lunate, whitish-flesh-color 

 inside and showing the band ; entire peristome expanded, basal and 

 columellar margins reflexed, the latter dilated and impinging a 

 little upon the umbilicus ; the brown bands at periphery and umbili- 

 cus are continued upon the expanded peristome. The ends of the 

 peristome converge, and are joined by a scarcely perceptible callus. 



Alt. 31, greater diam. 42 mill. 



Alt. 25, greater diam. 37? mill. 



Alt. 21, greater diam. 32 mill. 



Yokohama, Simoda, Tabusima and Awasima, etc., Japan. 



H. qucesita DESK, inFer., Hist., t. 10B, f. 10-12 ; texte, i, p. 179. 

 PFK. Mqnographia iv, p. 262. REEVE, Conch. Icon., f. 1355. 

 FORTUNE, Japan and China, p. 215. MARTENS, Ostas. Zool. Land- 

 Moll., p. 28, t. 15, f. 5. var. montium MARTENS, Novit. Conch, v, 

 p. 178, 1. 151, f. 1-3. H. perry i JAY, Commodore Perry's Narrative 

 of the Exped. of an American Squadron to Japan ii, p. 294, t. 5, f. 

 7, 8, 9, 1856. 



This species frequently lacks the peripheral band and the brown 

 lining of the umbilicus, being then of a uniform straw-yellow or 

 olive-tinged yellow color. The size varies much, and the umbilicus 

 may be either quite wide at its opening or narrow. 



Var. PERRYI Jay. PI. 41, figs. 8, 9. 



Shell similar in form to H. qucesita; somew r hat more solid ; three- 

 banded with tawny ; middle or supra-peripheral band narrow, 

 bordered on each side with yellow ; upper and lower bands wide, fad- 

 ing into the ground-color toward suture and umbilicus ; interior of 

 umbilicus dark. 



Yeddo. 



