92 THE LAND MOLLUSC AN FAUNA OF BRITISH NEW GUINEA, 



Hab. — Woodlark Island (French Missionaries, Kowald and 

 Belford, Dr. Rabe fide Brazier) ; Normanby Island (Dr. Rabe), 

 the latter a doubtful locality. 



50. G. TROBRIANDENSIS, n.Sp. 



(Plate xi., fig. 28.) 



Shell imperforate, trochiform, thin, translucent, keeled at the 

 periphery, keel becoming obsolete latterly ; colour white, encircled 

 by seven chestnut bands, four above and three below the periphery, 

 these bands are very variable, each or all may disappear or coa- 

 lesce, when absent a translucent band marks the site, the bands 

 fade away on the penultimate whorl, occasionally as in allied 

 species opaque alternate with translucent dashes radiating from 

 the suture, peristome from the insertion of the right margin to the 

 centre of the base an intense black ; whorls 4J, convex, last con- 

 tracted ; sculpture, obliquely finely striated and finely granulated ; 

 apex obtuse, embryonic whorls distinct, 1 J ; suture impressed ; 

 base slightly convex ; aperture oblique, scarcely descending, peri- 

 stome expanded and reflected, right margin sinuate, columellar 

 margin straight bearing above a small tubercle, margins connected 

 by a thin, transparent, microscopically granulated callus. Diam. 

 maj. 24, min. 18, alt. 16 mm. 



Type in Queensland Museum. 



Hab. — Trobriand Islands (Kowald and Belford); on trees ; 

 abundant. 



The local representative of the G. louisiadensis group. 



51. G. taumantias, Tapparone-Canefri, 1883. 



1 11 us 11 — Ann. Mus. Gen. xix. pi. 3, figs. 13, 14. 



Descr"- — L.c. p. 141. 



Anat. — L.c. pi. 6, fig. 4, pi. 9, figs. 16, 18. 



T y p e in Genoa Museum. 



vars. alpha and beta. 



