HELTX-PAPUINA. 27 



Spire elongated, rather acute ;* suture margined ; whorls 6, a little 

 convex, perceptibly increasing, the last not descending in front, 

 having an acute carina below the middle ; base but little convex. 

 Aperture oblique, subrhomboidal-lunar ; peristome white, narrowly 

 expanded, the upper margin acute, basal arcuate, reflexed, covering 

 the perforation. Alt. 17, greater diam. 20, lesser 16 mill. (Ad.) 

 Port Dorey, Andai, Amberbaki, New Guinea; Moluccas. 



Geotrochus blanfordi H. AD., P. Z. S. 1865, p. 415, t. 21, f. 1 

 (preoc.). WALLACE, /. c.,p. 412. H. blanfordi PFEIFFER, Monogr. 

 v, p. 327, 501. IT. blanfordiana H. AD., P. Z. S. 1869, p. 275. 

 H. blainfordiana (sic) TAPPARONE CANEFRI, Ann. Mus. Civ. Genov. 

 xix, p. 133, 1883. H. poirieri TAP. CAN., Bull. Soc. Zool. Fr. 1878, 

 p. 270. H. t-urbinata VAL., in schedis Mus. Zool. Parisiensis teste 

 Tapp. Can., not turbinata of Beck or Jan. 



The variety called poirieri by Tapporone Canefri is more ele- 

 vated, aperture rounder, base less dilated than the type. 



(4.) GROUP OF H. POIRETIANA. 



Narrowly, obliquely, perforated ; elevated-trochiform ; the last 

 whorl descending in front ; the superior lip not expanded. Surface 

 obliquely lightly striatulate. 



Differs from the groups typified by H. meta and H. pileus in the 

 descending last whorl, and simple, not expanded outer lip. 



H. POIRETIANA Pfeiffer. PL 8, figs. 46, 47, 48, 49. 



Narrowly, obliquely perforated, elevated-conical, the periphery 

 rounded ; last whorl, deeply deflexed in front ; color white, with a 

 narrow brown line below the middle of the body-whorl, and a faint 

 brown spot on the columella. 



The spire is high-conic, apex obtuse ; whorls 7, scarcely convex, 

 the last descending in front. Surface somewhat shining, obliquely 

 striatulate ; pure-white above, brown-tinged beneath, with a narrow 

 band (often sub-obsolete) just under the periphery. Aperture trans- 

 versely oblong ; upper and outer lips, not expanded, basal lip some- 

 what expanded, triangularly dilated at the umbilicus, which it 

 nearly conceals. 



Alt. 23 ?, greater diam. 19, lesser 16 mill. 



Night Island, N. E. Coast Australia. 



H.poiretiana PFR. P. Z. S. 1851, p. 254; Monogr. iii, p. 149; 

 Conchyl. Cab. p. 372, t. 140, f. 5, 6. RVE., Conch. Icon. f. 418. 



