HELIX-ALBERSIA. 91 



tenuis Pfr., the habitat of which is unknown ; but it is flatter, the 

 whorls more rapidly increasing, the peristome straight, and the col- 

 umella differently formed. 

 The jaw is arcuate, ribbed. 



H. ZONULATA Ferussac. PI. 19, figs. 7, 8 (and var. f. 6.) 



Shell imperforate, depressed-globose, thin ; roughened by very 

 minute decussating lines, a little shining ; of a tawny flesh color 

 with a whitish band at the periphery, and a narrow rufous band 

 above it. Whorls 5, a little convex, the last ventricose ; columella 

 slender, reddish, calloused. Aperture rotund-lunar; peristome 

 simple, reflexed, columellar margin dilated, covering the place of 

 the umbilicus, its junction with the basal margin forming a sub- 

 denticulate angle. 



Alt. 15, greater diam. 26, lesser 21 mill. (Pfr.) 

 New Guinea at Port Dorey ; Andai ; AmberbaJci ; Waigheu ; 

 Wokan, Wama and Giabu Lengen, Aru Is. ; Is. of Jobi, in the bay 

 of Geelvink ; Secaar, S.-E. New Guinea. 



H. listeri FEB., Prodr., p. 28, no. 22, (not H. listeri Gray). H. 

 zonulata FER., Prodr., p. 67 ; Histoire, t. 15, f. 1, 2. PFR., Conch. 

 Cab., p. 310, t. 53, f. 3-5; Monogr. i, p. 261. MARTENS, Ostas. 

 Zool., p. 393. Albersia zonulata WALLACE, P. Z. S. 1865, p. 410. 

 H. (Albersia) zonulata TAPPARONE CANEFRI, Ann. Mus. Civ. 

 Genov. xix, p. 185 ; and /. c. 2d. ser., iv, p. 143, 1887. H. lemniscata 

 LESSON, Voy. de la Coquille, p. 306. H. reuluziana LE GUILL. Rev. 

 Zool. 1842, p. 137. PER., Monogr. i, 334. 



Var. RECLUZIANA Le Guill. PI. 19, fig. 6. 



Shell larger. Alt. 17, greater diam. 30, lesser 24 mill. 

 VAR. Shell smaller, rather solid, peristome without a tooth. 



Alt. 12, greater diam. 19, lesser 16 mill. (Tap. Can.) 



Andai; Amberbaki. 



H. TENUIS Pfeifler. Vol. V, pi. 6, figs. 56, 57. 



Shell imperforate, subglobose, thin, brown with a rufous zone, 

 marked with obsolete impressed concentric lines, covered with a very 

 thin silky epidermis; spire rather obtuse ; whorls 5, rapidly increas- 

 ing, slightly convex, the last large, inflated, excavated at the oblique, 

 subtortuous columella. Aperture lunate-oval ; peristome straight, 

 simple, subthickened at the base. 



Alt. 20, greater diam. 32, lesser 26 mill. (Pfr.) 



Habitat unknown. 



