48 HELIX-PAPUINA 



periphery, but they show no light zone at the circumference. As far 

 as my specimens or the published figures show, lambei, gaberti and 

 phceostoma have always a light peripheral zone. I am at a loss, 

 therefore, to name the figures of PfeifFer, which I have copied on 

 plate 7, figs. 36, 37. 



H. GABERTI Lesson. PI. 7, figs. 35, 38, 39. 



Imperforate, elevated trochiform, the spire conical, nearly 

 straight-sided, composed of 6 whorls, the earlier two convex, whit- 

 ish, forming a papillar or sub-globose nucleus, the remaining whorls 

 but little convex, the last conspicuously angled at the periphery, 

 slightly descending in front. Surface having light growth-lines and 

 irregularly developed, fine, forward-descending wrinkles. Color 

 pale-yellowish maculated with irregular, interrupted zigzags of 

 chestnut-brown, often forming an irregular band below the carina. 



Aperture very oblique, streaked and spotted with dark-brown 

 inside ; lip broadly expanded, white. Columella deeply entering. 



Alt. 25, greater diam. 23, lesser 20 mill. 



Alt. 27, greater diam. 22, lesser 18 5 mill. 



Alt. 22, greater diam. 22, lesser 18 mill. 



New Ireland ; New Guinea ; Solomon Is. 



H. (Pileolus*) yaberti LESS. Voy. de la Coquille, Zool. ii, p. 314. 

 -PFR., Monogr. i, p. 231. REEVE, Conch. Icon. f. 100. DESH. 

 in Fer., Hist. p. 333, t. 106, f. 10-12. v. MART., Monatsb. Preuss. 

 Akad. Wissensch. zu Berlin, 1877, p. 276. TAPP. CAN. Ann. 

 Mus. Civ. Genov. xix, p. 138. tGeotrochus gaberti WALLACE, P. 

 Z. S. 1865, p. 412. IT. trochus Q. & G., Voy, Astrol. ii, p. 110, t. 

 8, f. 5-7. H. trochoides DESH., in Lamk. viii, p. 122 (not trochoides 

 Poir.) 



A much more elevated shell than H. lambei and differing from 

 H. phceostoma in being distinctly carinated. Pfeiffer's figures in the 

 Conchylien Cabinet (copied on my PI. 7 figs. 36, 37) do not seem to 

 represent gaberti. They may perhaps indicate a new species be- 

 tween gaberti and phceostoma. 



My figures are drawn from specimens from New Britian ; I do 

 not know whether the last two localities given above are to be de- 

 pended on, but consider them somewhat doubtful. 



H. LAMBEI Pfeiffer. PL 7, figs. 21-26. 



Imperforate, depressed, wider than high, the spire low-conic, apex 

 obtuse, corneous or brown ; whorls 5s, slightly convex, the last wide, 



