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 mill. 



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



New Ireland ; New Guinea ; Solomon Is. 



H. (Pileolus) gaberti 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. H. 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. PI. 7, figs. 21-26. 



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

 obtuse, corneous or brown ; whorls 5J, slightly convex, the last wid( 



