160 HELIX-HADRA. 



H. Roclcliamptonensis Cox, P. Z. S. 1873, p. 150. PFR. Monog. 

 Hel. Viv. vii. BRAZIER, Proc. Linn. Soc. N. S. W. v, p. 445. H. 

 planibasis Cox, ms. olim, teste Brazier. .H. moresbyi ANGAS, P. Z. 

 S. 1876, p. 267, t. 20, f. 8, 9. 



A more elevated shell than H. rainbirdi, flatter beneath, and with 

 the umbilicus less excavated. It is more elevated than H. appendi- 

 culata or H. lessoni, and the base is flatter. My esteemed corre- 

 spondent John Brazier has fully discussed the synonymy in the place 

 cited above. 



Var. MORESBYI Angas. PI. 36, figs 25, 26. 



Form more elevated, and light stripes more numerous, distributed 

 over the whole surface. Alt. 45, diam. 45 mill. 



Port Denison, Northern Queensland. 



H. INFORMIS Mousson. PL 34, fig. 4. 



Shell nearly covered umbilicate, oblong-globose, thick, obtusely 

 widely striated, under a lens seen to be covered with close, oblique, 

 very minute lines, somewhat silky, purple-black, unicolored or ob- 

 scurely unifasciate. Spire obtuse, conoid ; summit obtuse, denuded ; 

 suture linear, impressed, whorls 6, moderately widening, the ear- 

 lier less, later more convex, at the suture somewhat broadly plicated. 

 Last whorl large, slowly descending, somewhat swollen above and 

 below, subinflated on the base. Aperture oblique (40 to the axis), 

 equaling the spire, lunate-ovate, purplish inside. Peristome obtuse, 

 reflexed, somewhat thickened, margins distant, joined by a purplish 

 callus, straight, above and below more arcuate ; columellar margin 

 straight, elongated, deep, half closing the umbilicus by a broad ar- 

 cuate dilation. (Mouss.) Alt. 54, diam. 50 mill. 



Port Mac/cay, Queensland. 



H. informis Mouss., Journ. de Conchyl. 1869, p. 59, t. 4, f. 3. 

 PFR. Monogr. vii. 



This large species I have not seen. In its uniform dark color it 

 resembles H. blomfieldi, but that species is imperforate. 



H. PALMENSIS Brazier. 



Shell umbilicated, globosely turbinated, finely striated, the whole 

 surface marked with minute zigzag and lengthened grains, giving 

 the shell a granulated appearance, reddish yellow, with numerous 

 spiral chestnut lines and bands, very dark at the mouth, whorls 6, 

 slightly convex, the last convex above, deflected in front, suture 



