Monilea.] GASTROPODA. 143 



inner side 3 broad slightly crenulated ribs surround the umbilicus, 

 which is also prominently spirally ribbed. The 2 cinguli below the 

 suture are crossed and beaded by strong and sharp equidistant radiate 

 riblets, dividing the interstices into regular squares ; the remainder 

 of the whorls with fine growth-lines. Colour whitish, light horny. 

 Spire low, with convex outlines, very little higher than the aperture, 

 apex rather blunt. Protoconch small, globular, of 1 smooth and 

 convex whorl. Whorls 4, rather rapidly increasing, somewhat flattened 

 below the suture, then convex ; base convex. Suture subcanaliculate. 

 Aperture circular, slightly iridescent within. Peristome sharp, the 

 ends approaching and nearly meeting, united by a white parietal 

 callosity. Columella vertical, arcuate, slightly expanded. Umbilicus 

 about one-third of the diameter, deep and scalar. 



Diameter Maj., 5 mm. ; min., 4 mm. : height, 3-2 mm. 



Type in rny collection. 



Hob. Near the Snares, in 50 fathoms, empty shells only (Captain 

 Bollons). 



5. Monilea textilis, Murdoch andSuter, 1906. Plate 33, figs. 14, 14a. 

 Minolia textilis, M. & S., T.N.Z.I., xxxviii, 1905 (1906), 298, pi. 26, f. 45, 46. 



Shell small, conoidal, widely umbilicate, fragile, exquisitely sculp- 

 tured. Sculpture : There are numerous radiate sharp riblets at 

 regular intervals, the interspaces about twice the breadth of the 

 costee, crossing over broad rounded spiral cords ; on the third whorl 

 there are 3 spirals, which are supplemented on the following whorl 

 by a faint thread below the suture, and 1 between the first and 

 second cords ; on the last whorl there are 2 rather unconspicuous 

 threads below the suture, followed to the periphery by 5 strong spiral 

 cords, the last 3 more prominent than the others ; on the base there 

 are 5 narrow equal and close-set spiral riblets, and the umbilicus is 

 margined by a stout beaded ridge ; all the spiral cords are strongly 

 and sharply beaded by the longitudinal sculpture. Colour greyish- 

 white. Spire conoidal, apex rounded. Protoconch globular, small, 

 smooth, of 1 whorl ; the succeeding volutions show already distinct 

 radiate riblets and spiral threads. Whorls 4^, tabulate above, flatly 

 convex below the angulation of the shoulder ; base slightly convex. 

 Suture canaliculate. Aperture subcircular, angled above, white, not 

 nacreous inside. Outer lip sharp, convex, margined by denticles on 

 the outside, produced by the spiral ridges. Inner lip spread as a thin 

 callosity over the penultimate whorl, and connecting the margins ; 

 columella sharp, arched. Umbilicus wide, scalar, margined by a strong 

 beaded cord followed by 2 spiral ridges, beaded by longitudinal riblets. 



Diameter Max., 4-3 mm. ; min., 3-5 mm. : height, 3-8 mm. 



Type in the Dominion Museum, Wellington. 



Hab. Off Great Barrier Island, in 1 10 fathoms. 



Remark. The shell used for description (and the figures) is no 

 doubt not adult, as was evidenced by fragments of a larger shell of 

 the same species. 



