290 PAPUINA. 



Guinea, but from Seymour Bay, Ferguson Island. (See Hedley, P. 

 L. Soc., N. S. Wales 1891, p. 90). 



Page 78. The habitat of H. cyrene Crosse, is Ugi, Solomon Is. 

 Hedley believes it to be merely a form or var. of H. helicinoides, 

 together with zelina, cineracea, and quirosi. 



P. TROBRIANDENSIS Hedley. For figs, see Vol. IX. 



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

 periphery, keel becoming obsolete latterly ; color white , encircled 

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

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

 esce ; 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 center of 

 the base an intense black ; whorls 4J, convex, last contracted ; 

 sculpture obliquely finely striated and finely granulated, apex 

 obtuse, embryonic whorls distinct, 1 \ ; suture impressed ; base 

 slightly convex ; aperture oblique, scarcely descending, peristome 

 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 mill. (Hedley^ 



Trobriand Islands (Kowald and Belford) ; on trees ; abundant. 



Geotrochus trobriandensis HEDLEY, Proc. Linn. Soc., N. S. 

 Wales (2) vi, p. 92, t. 11, f. 28 (shell) ; ibid. p. 690, t. 38, f. 5 

 (jaw), 39, f. 14 (radula) 42, f. 33 (genitalia). 



P. HEDLEYI Smith. Unfigured. 



" This handsome species is imperforate, elevately conical, the 

 almost straight outlines forming at the apex an angle of about 60 

 degrees. It is sharply keeled at the periphery and almost quite flat 

 beneath. The upper and lower surfaces present a strong contrast 

 of color. The base is uniformly dark chestnut brown, whereas the 

 rest of the shell is of a yellowish buff tint, excepting a fine opaque 

 luteous line upon the keel, which revolves up the spire forming a 

 distinct margination above the suture, and a narrow dark brown 

 zone beneath the suture. The first four whorls are rather convex, 

 the next two are almost flat, and the last or body-whorl is distinctly 

 concave above the carina. The surface is glossy, and exhibits dis- 



