DRAPARNAUDIA. 15 



Allied to D. sinistrorsa, but differing in the acute peripheral keel, 

 flatter base with more distinct spiral lines, and uniform darker color. 

 It has about a half whorl less than simstrorsa, and the spire is a little 

 more slender above. 



It was originally described from Aneiteum, New Hebrides, the 

 type measuring alt. 7, greater diam. 9, lesser 7 mill. Pfeiifer meas- 

 ured the axis of the shell, not to the base of the lip ; so that his type 

 was about equal in size to the average New Caledonian specimens. 

 Reeve's figures confirm the proportions, though being enlarged, not 

 the size, of the typical singularis. A shell before me from the New 

 Hebrides, probably from Cuming, measures alt. 9, diam. 8.3 mill. 

 It is light brown, paler than New Caledonian shells, but perhaps 

 faded. Mr. Ancey (Nautilus 1897, p. 27) mentions specimens from 

 Aneiteum, received from E. L. Layard, "much smaller than any I 

 ever saw from New Caledonia ;" and in a later paper he gives the 

 New Caledonian shells the name " var. major" (without descrip- 

 tion). It is evident, however, that the facts do not support such 

 separation. 



D. SINISTRORSA (Deshayes). PL 3, figs. 2, 3. 



Shell sinistral, openly umbilicate, turbinate-conic, straw-yellow. 

 Surface somewhat glossy, sculptured with fine and very oblique 

 growth-wrinkles. Spire conic, the lateral outlines straight (or 

 slightly concave above); whorls 7, moderately convex, closely coiled, 

 the last whorl depressed, rapidly expanding near the aperture (especi- 

 ally noticeable in a view from above), rounded at the periphery and 

 beneath, perforated by a deeply penetrating, comma-shaped umbilicus. 

 Aperture extremely oblique, truncate oblong ; the peristome white, 

 well expanded, upper margin evenly arched, basal-columellar margin 

 straight, parietal callus transparent but rather heavy. 



Alt. 9.4, diam. 8.3 mill.; longest axis of aperture 5.8, width 4.3 

 mill. 



Alt. 10, diam. 8.5 mill.; longest axis of aperture 6, width 4.4 mill. 



New Caledonia: Isle of Pines (Lambert); Mount Mou (Marie;; 

 also Ouvei and Mai 6, Loyalty Is. 



Bulhnus s/nisti'orsus DESH., in Fer., Histoire ii, p. 24, pi. 161, f. 

 19-21 (1840). G ASSIES, Faune Conch. N.-Caled. i, p. 51, pi. 2, f. 

 3 (1863). PFR., Monogr. iii, p. 322 Hdix siiiistrorsa Pi R., 

 Monogr. iv, 260 ; v, 337, 502. Draparnaudia michaudi MONTROU- 



