HELIX-HADRA. 163 



examples is still lighter. The spire is always lighter in tint, and 

 usually lineated with brown as shown in figure 63 of the plate. 

 Whorls 6?, closely coiled, but slightly convex, the last descending 

 "in front. Aperture oblique, dark within, becoming lighter toward 

 the white-edged lip which is expanded on its outer and basal mar- 

 gins, dilated at the columella in a triangular plate, purplish in color, 

 'Overhanging and more than half covering the umbilicus. 



Alt. 27, greater diam. 33, lesser 28 mill. 



Alt. 26, greater diam. 30 mill. 



Port Curtis, Queensland, Australia. 



H. lessoni PFR. Symbolse iii, p. 71 ; Monographia i, p. 233, v, 

 500 ; Conchyl. Cab. p. 363, t. 138, f. 9, 10. REEVE Conch. Icon. f. 

 754. Cox Mon. Austr. L. Sh. p. 55, t. 4, f. 10. H. Rangii LESSON, 

 Voy. de la Coquille, p. 305 (probably ; not H. Rangii Fe*r.). H. 

 seminigra MORELET Journ. de Conchyl. 1864, p. 289. Callicochlias 

 lessoni FFLD. Verh. zool.-bot. Ges. Wien, 1869, p. 875.Hadra 

 lessoni SEMPER, Reisen in Arch. Phil., Landmoll. iii, p. 160. 



From H. parsoni this species is distinguished by its more depressed 

 stature and constantly white-edged lip. The lighter, banded forms 

 connect it with H. appendiculata, which seems to be merely a vari- 

 ety. H. incei is generally smaller, much lighter colored, the ground- 

 color being buff. Finally in H. yulei the lip is dark, not white- 



The shells described and figured agree with what is universally 

 recognized as H. lessoni. Pfeiffer's description indicates a smaller 

 form, differing somewhat in coloration ; his figures are copied on pi. 

 35, figs. 14, 15. 



Var. APPENDICULATA Pfr. PI. 33, figs. 71, 72. 



Shell half-covered-umbilicate, globose, depressed on the base, 

 brownish-yellow with numerous spiral reddish-chestnut bands and 

 lines. Whorls 6, the last suffused with deep chestnut behind the 

 expanded peristome. Aperture dark within, or light and showing 

 the bands. Lip white, darker and purplish-brown at the expanded 

 columelia. 



Alt. 27, greater diam. 32 mill. 



Alt. 30, greater diam. 34 mill. 



Port Denison, Queensland. 



H. appendiculata PFR. P. Z. S. 1854, p. 149 ; Monographia Hel. 

 Viv. iv, p. 261. Cox, Mon. Austr. L. Sh. p. 56, t. 5, f. 11. 



