290 HELIX-PLANISPIRA. 



v, p. 311. H. aspasia H. AD. P. Z. S. 1865, p. 415. PFR. MOD. v, 

 p. 312. H. except, var. elatior MARTENS, Ostas. Zool., p. 297. Pla- 

 nispira aspasia WALLACE, P. Z. S. 1865, p. 409. 



This aberrant species may be recognized by its closed umbilicus 

 (open in the young) and hairy surface. It varies greatly in colora- 

 tion. The typical pattern is described above, and figured on pi. 65, 

 figs. 86, 87. Another form with few bands is figured on pi. 45, 

 figs. 50-52. 



Form phryne Pfr. (pi. 65, figs. 84, 85). Spire more depressed, 

 aperture more oblique, more ovate, the lip more broadly expanded ; 

 columellar tooth minute. 



Form aspasia H. Ad. (pi. 45, fig. 53.) Only one band ; the next 

 to the last whorl a little projecting. This is var. elatior Martens. 



H. THETIS Pfeiffer. PI. 56, figs. 74, 75, 76. 



Shell umbilicated, obtusely bell-shaped, rather thin, smooth, 

 shining, white, with two brownish-black bands. Spire elevated, 

 obtuse ; whorls five, a little convex, the three upper ones forming a 

 corneous, flat or sub-sunken apex, the penultimate whorl inflated, 

 the last whorl high, very obliquely descending in front, most ob- 

 soletely angulated, the base rather flat ; umbilicus narrow, obliquely 

 entering; aperture very oblique, truncate-elliptical, concolored 

 within ; peristome simple, broadly expanso-reflexed, margins con- 

 niving, the columellar dilated above and adnate above the umbili- 

 cus, having a callous tooth within. 



Alt. 14, greater diam. 22, lesser 17 mill. (Pfr.') 



Habitat unknown. 



H. thetis PFR. Zeitschr. f. Mai. 1851, p. 127 ; Conchylien Cabinet, 

 p. 443, t. 153, f. 1-3 ; Monogr. iii, p. 217. 



Evidently, as Von Martens has said, very closely allied to H. ex- 

 ceptiuncula, differing in the more elevated form and perforate um- 

 bilicus. It may prove a mere variation of the species named. 



H. NOV^GEORGIENSIS Cox. PL 54, fig. 23 ; pi. 65, fig. 91. 



Shell imperforate, globosely depressed, surface corrugated and 

 shiny, white, ornamented with 5 or 6 narrow brown bands ; apex of 

 spire bluntly rounded ; whorls 4, rapidly increasing in size, each 

 flatly sloping to the center, causing a subcarinated appearance ; last 

 whorl suddenly deflected in front, and carinated near the aperture ; 

 aperture very oblique, ear-shaped, margin ivory-white, flatly ex- 



