30 HELIX-PAPUINA. 



The following forms are described by v. Martens : 



Form turrita (figs. 2, 3). White or pale isabelline, painted with 

 narrow blackish-brown lightning-streaks; last whorl distinctly 

 descending. Alt. 20, diam. 20 mill. This is like Ferussac's fig. 2. 



Form pyramidata (figs. 99, 100). Pale brownish ; marbled with 

 broader subdiaphanous brown lightning-streaks; base nearly uni- 

 colored, the last whorl scarcely descending. Alt. 21, diam. 24 mill. 

 This corresponds to Ferussac's fig. 1. 



Form convexa. Subdepressed, whitish, marbled with wider 

 lightning-streaks of pale brown : base nearly unicolored ; last whorl 

 abruptly descending. Alt. 14, diam. 24 mill. 



Form depressa (fig. 1). Whitish, with rather narrow brown 

 markings, the base unicolored. 



H. RHYNCHOSTOMA Pfeiffer. PI. 11, figs. 96, 97, 98. 



Narrowly umbilicated, trochiform, acutely carinated, rather thin, 

 striatulate and under a lens very minutely granulated; flesh-colored, 

 with two reddish bands, one above, the other wider and on the base. 

 Spire conical, somewhat obtuse, suture carino-marginate ; whorls 6, 

 nearly flat, slowly widening, the last scarcely descending in front, 

 base nearly flat. Aperture very oblique, subtriangular ; peristome 

 thin, margins distant, the upper slightly expanded, recurved into a 

 beak at the outer angle ; basal margin narrowly reflexed, columellar 

 dilated, concealing the umbilicus. Alt. 17, greater diam. 25, lesser 

 22 mill. (P/r.) 



Satchian, Moluccas. 



H.rhynchostomaPFR.,P.Z. S. 1861, p. 21, t. 2, f. 6 ; Novit. 

 Conch, p. 166, t. 45, f. 9-11 ; Monogr. v, p. 328, 501. 



Evidently allied to H. pileolus, but totally different in coloration. 



H. FERUSSACI Lesson. PL 3, fig. 51. 



Shell imperforate, trochiform, deep-chestnut, with a golden-yel- 

 low line at the carina, and ascending the spire to the apex ; whorls 

 6, completely flat ; the apex is enlarged, convex ; the last whorl has 

 a salient acute carina. Aperture much depressed, triangular, wider 

 than high, very acute at the junction of the upper and basal lips ; 

 peristome reflexed, sinuous at the angle. 



Port Dorey, New Guinea, on trees. 



Helicogona (helix) Ferussacii LESSON, Voy. de la Coquille, Zool. 

 ii, p. 315, t. 8, f. 5. Helix Ferutsaci PFR. Monogr. Hel. Viv. i, p. 



