498 GASTROPODA. [Pectinibranchia. 



deep. Aperture subpyriform, angled above, with, a short broad and 

 somewhat recurved canal below. Outer lip thickened by the last 

 rib, convex, lightly contracted below, with a shallow rounded sinus. 

 Columella vertical, lightly arcuate. Inner Up narrow, smooth, extend- 

 ing over the straight parietal wall. 



Diameter, 3 mm. ; height, 6 mm. Examples from Foveaux Strait, 

 2 mm. by 5 mm. 



Animal unknown. 



Type, from the Pliocene, in the Canterbury Museum, Christchurch. 



Hab. Off Great Barrier Island, in 110 fathoms ; Hauraki Gulf 

 (H. S.) ; Lyall Bay ; Foveaux Strait, in 15 fathoms (A. Hamilton) ; 

 Chatham Islands ; near the Snares, in 50 fathoms (Captain Bollons) ; 

 near Cuvier Island, in 38 fathoms (Captain Bollons). 



Fossil in the Pliocene. 



4. Mangilia epentroma, Murdoch, 1905. Plate 21, figs. 23, 23a. 



Clathurella epentroma, Murd., T.N.Z.I., xxxvii, 1904 (1905), 219, pi. 7, f. 3, 4 ; 

 Suter, J. Mai., xii, 73. 



Shell small, narrowly fusiform, thin, lightly turriculated, with 

 prominent axial riblets, spirally striate. Sculpture consisting of 

 narrow equidistant axial riblets, 15-16 on the last whorl, equal to or 

 rather wider than the interspaces, and usually less developed on the 

 anterior end ; they are continuous in some, irregular in other ex- 

 amples ; the spirals consist of undulating delicate riblets and threads. 

 On the spire- whorls there are 2, and on the last 7 or 8 slightly 

 stronger ; of these, the four posterior are more widely spaced, two 

 are above the outer lip, and one in hue with it ; frequently forming 

 beads on crossing the axials. Within these spaces there are, on that 

 adjoining the suture, 4 or 5 threadlets, sometimes irregular in size ; 

 on the succeeding three spaces usually 3 threadlets in each, the 

 median one frequently strongest. Anterior to this the interspaces 

 with 1 to 3 threads. Fasciole on the beak sometimes with irregular 

 riblets. Colour light rufous or dull chestnut. Spire elevated conic, 

 lightly turriculate, about 1^ times the height of the aperture. Proto- 

 conch of 1| whorls, strongly angled, and with 4 narrow revolving 

 riblets, the posterior minute and near the suture ; the apical half- 

 turn obliquely curved down and somewhat imbedded in the suc- 

 ceeding whorl. Whorls 5|, rounded, or obscurely angled above the 

 periphery ; base somewhat contracted. Suture deep. Aperture sub- 

 vertical, oval, angled above, with a short and broad canal below. 

 Outer lip simple, convex, smooth inside, with a shallow sinus close to 

 the suture. Columella vertical, lightly curved, smooth. Inner lip 

 narrow and thin. 



Diameter, 2-1 mm. ; height, 5-7 mm. 



Animal unknown. 



Type in the Dominion Museum, Wellington. 



