292 HELIX-PLANISPIRA. 



The supra-peripheral band in this species extends to the edge of 

 the expanded peristome. It is rarely absent, as in Hombron and 

 Jacquinot's figure 13 of plate 5, Voy. au Pole Sud. The peristome 

 is rosy in specimens collected at Dorey Hum (Tapp. Can., Ann. 

 Mus. Civ. 1887). 



The H. Kiesneri of LeGuillon, briefly diagnosed in Revue Zool. 

 1842, p. 140, and not figured nor recognized by subsequent authors, 

 is perhaps synonymous with corniculum. See also Pfr., Monogr. i, 

 p. 427, and Tapparone Canefri, Annali del Mus. Civ. di Genova, 

 xix, p. 181, 1883. It is from Triton Bay, New Guinea. 



H. DEANIANA Ford. PL 63, figs. 56, 57, 58. 



Shell umbilicated, discoidal, flattened above and below ; thin but 

 solid ; white, with a broad chestnut-brown zone encircling the last 

 whorl just above the periphery, and continued on the next earlier 

 whorl immediately above the suture. 



Surface comparatively smooth, the growth striae being very faint. 

 Whorls 4?, convex, the inner ones sunken a trifle below the level of 

 the penultimate whorl, which projects very slightly above the last 

 whorl. The latter is large, rounded above, below and at the peri- 

 phery, slowly descending in front to about the middle of the pre- 

 ceding whorl ; very narrowly and deeply constricted behind the 

 basal lip, much inflated just behind the constriction, and with an 

 oblique excavation behind the columellar lip running into the um- 

 bilicus. Aperture very oblique, rotund, lunar, white, showing the 

 brown band inside. Lip broadly expanded on upper and outer 

 margins, very narrowly reflexed on the basal and columellar. The 

 outer and basal portions are of a beautiful pink rose-color. The 

 parietal wall has a thin wash of callus. Umbilicus funnel-shaped 

 and slightly impinged upon by the columellar lip. 



Alt. 11, greater diam. 26, lesser 20 mill. Aperture, oblique alt. 

 16, breadth 14J mm., including peristome. Width of umbilicus 

 21 mm. 



New Guinea. 



H. (Planispira) Deaniana JOHN FORD, Proc. Acad. Nat. Sci. of 

 Philadelphia, 1890, p. 188 (July 29, 1890.) 



This beautiful species stands between H. corniculum and H. do- 

 minula. It is less elevated, less convex above than the latter species, 

 the swelling on the base is much nearer the basal lip, causing the 

 constriction to be narrower, and the umbilicus is far broader, far 



