40 HELIX-PAPUINA. 



margin regularly curved, basal margin narrowed somewhat, and 

 nearly straight, forming an angle with the dilated columellar mar- 

 gin, which nearly closes the umbilicus. Alt. 22, greater diam. 33, 

 lesser 26 mill. (T. C.) 



Banks of the Fly River, Southern New Guinea. 



H. taumantias T. C., Ann. Mus. Civ. Genov. xix, p. 141, t. 3, f. 

 13, 14 (shell) ; t. vi, f . 4 ; t. ix, f. 16, 18 (anatomy), 1883. 



Resembles JET. lituus in form, and H. multizona in coloration. 

 Form a. Shell a little larger, peristome rosy- violet. 

 Form b. Shell small, spire more raised, peristome rosy. 



H. RIDIBUNDA Tapparone Canefri. PL 5, figs. 82, 83. 



Narrowly umbi Heated, orbiculate-conoid, obliquely striated, pel- 

 lucid, buff, variously brown banded and lineate, and having a brown 

 peripheral zone, which is sometimes bordered below with white. 

 Base convex-depressed, variously banded and lineated with brown. 

 Spire conoid, apex sub-acute, brownish ; whorls 5i, a little convex, 

 transversely sub-striate under a lens ; last whorl large not descend- 

 ing in front. Aperture transversely lunate, sub-effuse ; peristome 

 rather narrow, margins expanded and reflexed, not approaching ; 

 right margin regularly curved, basal straightened, columellar 

 margin moderately dilated and reflexed above the umbilicus. 



Alt. 19, greater diam. 29, lesser 23 mill. (T. (7.) 



Banks of the River Fly, New Guinea. 



H. ridibunda T. C., Ann. Mus. Civ. Genov. xix, p. 142, t. 3, f. 10, 

 11 (shell) ; t. vi, f . 5 ; t. viii, f. 17 (Anatomy) 1883. 



Closely allied to H. taumantias, but smaller, the spire more elevated, 

 the color and form of the lip different. 



H. MEDITATA Tapparone Canefri. PI. 5, fig. 84. 



Narrowly umbilicated, globose-conoid, rather solid, subcarinate 

 at the periphery ; whitish-buff, variously lineated and banded with 

 brown ; base depressed ; spire conoidal, the apex subacute, brownish. 

 Whorls 51, the last not descending. Aperture lunar rounded- 

 ovate; peristome whitish, narrowly subreflexed throughout, the 

 margins not approaching ; right margin regularly curved, basal sub- 

 curved, columellar very much dilated and reflexed above the um- 

 bilicus. Alt. 15, greater diam. 21, lesser 17 J mill. (T. C.) 



Katau, Southern New Guinea. 



