224 HELIX-EUHADRA. 



the last whorl convex, 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 ; columella 

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

 lip reflexed, rounded, white or violaceous. 



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



Song-ma, Tonqidn. 



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, columella shortly 

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

 (8. & B.} 



Alt. 20J, greater diam. 25?, lesser 22J mill. 



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



South Cape of Formosa, on the Mts. 



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, 

 80,66. 



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 



