122 HELIX-EUHADRA. 



scending a trifle or not at all in front. Aperture slightly oblique, 

 lunate ; peristome expanded and reflexed, purplish-brown. 



Alt, 21, greater diam. 32, lesser 28* mill. 



Alt. 25, greater diam. 38, lesser 34 mill. 



China (Pfr.) ; Liu-Kiu Islands (Phil. Acad. Coll.) 



H. mercatoria Gray (in British Mus.). PFEIFFER in Zeitschr. f. 

 Mai. 1845, p. 154; Monogr. Hel. Viv. i, p. 331 ; Conchy-lien Cab- 

 inet, p. 336, t. 132, f. 1, 2. REEVE, Conch. Icon., f. 383. 



This is a pleasing species, allied to H. succincta somewhat, and 

 like that species in general outline, closely coiled whorls and in the 

 aperture, which is not so oblique in these forms and in the general- 

 ity of depressed helices. The nearly lusterless surface sometimes 

 shows in places very fine spiral incised lines, when viewed under a 

 strong lens; but such sculpture is neither frequent nor characteristic. 

 The largest specimen before me measures 37 mill, in diameter ; the 

 smallest is of a li^ht russet-tinged yellow color, the umbilicus a 



C^ v 



shade darker, and banded like the usual form. It measures alt. 16, 

 greater diam. 26, lesser 23 J mill. 



H. SUBMANDARINA Pilsbry. PI. 42, figs. 33, 34, 35. 



Shell narrowly umbilicated, somewhat turbinate, conoidal above, 

 flattened below ; yellowish, with a narrow brown peripheral band ; 

 periphery rounded ; lip a little expanded, labiate within. ' 



The shell has a narrow but deep and tubular umbilicus ; it is 

 somewhat trochoidal in outline, very solid and strong, opaque ; 

 spire elevated, composed of 6 very convex, slowly widening whorls, 

 the last one rounded at the periphery, scarcely descending in front ; 

 apex a little obtuse ; suture deeply impressed. Aperture slightly 

 oblique, small, showing the band within and upon the face of the 

 lip ; peristome slightly expanded, strongly labiate or thickened in- 

 side ; columellar margin a little dilated, impinging upon the nar- 

 row umbilicus. 



Alt. 18, greater diam. 21 mill. ; width of umbilicus 1} mill. 



Liu-Jcin,, Is. f 



This is a species belonging to the H. succincta group, but much 

 more trochoidal than that species and of a solid, heavy texture. In 

 the elevated spire, rounded periphery and heavy texture there is 

 some resemblance to H. mandarina ; but it differs wholly from that 

 species, having the axis perforated. Two specimens are before me ; 

 one received from J. G. Anthony, labelled " China" ; the other is 



