154 HELIX-HADRA. 



H. BLOMFIELDI Cox. PI. 23, fig. 67. 



Shell imperforate, globose elevated, unicolored deep chestnut 

 on the body-whorl, lighter on the whorls of the spire and showing 

 spiral bands or lines there ; aperture purplish or purplish-brown 

 inside, the broadly expanded lip brown or purplish. 



The form is elevated-globose, spire short with convex outlines ; it 

 is solid, dark chestnut (according to Cox, deep, purplish chestnut), 

 with a yellow margin below the suture from to one millim. wide. 

 Earlier whorls light fawn colored, with inconspicuous darker stripes 

 or lines. Surface showing sometimes very close, fine, subobsolete, 

 spiral strise. Sutures superficial. Whorls 6J, slightly convex, the- 

 last deeply descending anteriorly. Aperture oblique ; lip broadly- 

 expanded and subreflexed, suddenly dilated at the umbilicus and 1 

 closely adhering to the base of the shell over it. In immature shells 

 the umbilicus is not covered, and the lip is deep brown ; in adults 

 a whitish layer is deposited over the brown, giving a purplish effect, 



Alt. 39, greater diam. 36, lesser 31 mill. 



Port Curtis, Queensland, Australia. 



H. Blomfteldi Cox, Catal. Austr. Land Sh. p. 19, 1864 ; Monog. 

 Austr. Land Sh. p. 57, t. 1, f. 1. PFR. Monog. Hel. Viv. v, p. 

 284; Conchyl. Cab. t. 163, f. 1, 2. TAPPAEONE-CANEFBI, Zool. 

 Viaggio della Fregata Magenta, p. 92, t. 2, f. 5. HEDLEY, Proc. 

 Roy. Soc. Queensl. 1889, p. 103, pi. vii, (anatomy). 



With the general contour of H. coxi and H. croftoni, this species 

 has a decidedly more lengthened aperture, the basal lip being pro- 

 duced downward very much as in Cochlostyla or Bulimus, whilst in 

 the other species named it is more transverse. Moreover, in blom- 

 field there is a distinctly salient angle where the concave, triangular 

 and dilated columella joins the basal lip, a structure not so plainly 

 shown in coxi or croftoni. There is no trace whatever of darker 

 or lighter bands on the body- whorl, save only the subsutural yellow 

 line. 



H. MITCHELLS Cox. PI. 47, figs. 92, 93. 



Shell imperforate, globosely-turbinated, solid, striated with the 

 lines of growth, under the lens universally reticularly or irregularly 

 linearly granulated, deep reddish chestnut, with four yellow bands, 

 one broad in umbilical region, another narrow along the periphery, 

 with a blackish band above it, a third, broader and separated by a 

 dark band from a very narrow fourth at the suture ; spire roundly 



