224 HELIX-EUHADRA. 



the last whorl COD vex, not descending in front, convex beneath, 

 encircled at the periphery with a chestnut or whitish zone. Aper- 

 ture ovate-lunar, the margin joined by a very thin callus ; colurnella 

 short, outwardly dilated at the umbilicus ; basal margin arcuate, 

 lip reflexed, rounded, white or violaceous. 



Alt. 28, greater diam. 39, lesser 31 mill. (Morlef) 



Song-ma, Tonquin. 



Helix massiei MORL., Journ. de Conch., xxxi, 1891, p. 26, 244, 

 247, t. 5, f. 2. 



H. PANCALA Schmacker & Boettger. PI. 29, figs. 85, 86, 87. 



Shell siniscral, perforated, conoid-globulose, rather solid, straw- 

 colored or tawny-yellowish, with two brown bands ; perforation 

 sometimes brown ; shining. Spire moderately raised, convex-conic, 

 the apex rather acute. Whorls 6, very slowly increasing, rather 

 convex, separated by an impressed suture, subregularly obliquely 

 striated, and decussated by irregular, indistinct, impressed spiral 

 lines; the last whorl subcylindrical, slightly enlarged at the aper- 

 ture, not descending, a little more than one-half the altitude of the 

 shell. Aperture diagonal, transversely elliptical, slightly lunate ; 

 peristome expanded, a little reflexed ; throat whitish with two black 

 bands ; margins of peristome white-lipped, widely separated, joined 

 by a very thin sigmoid callus, the upper and left margins regularly 

 curved, basal elongated, straightened somewhat, colurnella shortly 

 ascending, vaulting, reflexed over and half covering the umbilicus. 

 (8. & B.) 



Alt. 2(H, greater diam. 25*, lesser 22J mill. 



Alt. 14-23, greater diam. 20-27, lesser 17-24 mill. 



South Cape of Formosa, on the J/fe. 



H. bacca var. sinistrorsa MLLDFF., Jahrb. D. M. Ges. xi, 1881, p. 

 387 (not H. bacca Pfr. nor H. sinistrorsa Charp. or Desh.) H. 

 (Hadra) pancala SCHM. & BTTG., Nachr.-Bl. 1891, p. 161, t. l,f. 6, 

 6a, 66. 



The typical form lives in the mountains on trees. Most individ- 

 uals have two dark bands, but in some the space between the bands 

 is darker than the rest of the shell, chestnut-brown ; and the rest of 

 the shell then is of a darker tone than usual. In a few specimens 

 the upper band is lacking, and finally there are also examples with 

 two distinct bands and one obsolete upper band, and the perforation 



