DESCRIPTIONS OF NEW LAND SHELLS — HEDLEY. 45 



to the drawings of several that I have some confidence in intro- 

 ducing it under that genus. If this classification be correct, the 

 range of the genus is now by a leap of three thousand miles ex- 

 tended from Borneo and the Philippines to New South Wales ; 

 thus introducing into Australia a fresh component of that faunal 

 element which Prof. Spencer has termed " Torresian."* 



Endodonta waterhousi^, n. sp. 

 (PI. xi., figs. 7, 8, 9, 13, 14.) 



Shell sub-discoidal, spire sunk, widely umbilicated, opaque, dull. 

 Colour, on a ground of pale bufi" above irregularly splashed with 

 madder brown which beneath tends to flow in irregular, oblique 

 and zig-zag lines, apex pale straw. Whorls four and a half, rounded 

 except for a flattening between the suture and the periphery, the 

 first three whorls slightly and gradually ascending above the apex, 

 the last half whorl broadening slightly and gradually and slightly 

 descending. Sculpture consisting of sharp lamellate ribs, slightly 

 flexed at their origin at the suture, then crossing the whorl at 

 right angles, curving backwards and downwards to the periphery, 

 thence taking a straight course to the lip of the umbilical crater, 

 over the edge of which they curve forwards ; on the last whorl 

 these ribs number ninety-five, on the penultimate fifty-three, and 

 on the antipenultimate thirty-two; they crowd closer as the whorls 

 proceed, but the spacing is not always uniform ; on the last whorl 

 the interstices are as broad or twice as broad as the ribs, on the 

 final sixth, however, the ribs tend to obsolescence ; most minute 

 hair lines, parallel to the major sculpture, occupy these interstices; 

 the ribs cease entirely and suddenly at the initial whorl and a-half, 

 which by transmitted light are shown to possess radial hair-lines 

 decussated by equally fine spiral striae. Umbilicus a third of the 

 base of the shell in diameter, cup-shaped, exposing every preceding 

 whorl, coloured and sculptured like the spire. Aperture slightly 

 oblique, subrhomboidal, peristome sharp, straight, even at the 

 columellar margin ; viewed from above the peristome describes a 

 wide convex, then a sharper concave curve on approaching the 

 insertion. Projecting callus on body whorl steel purple, burying 

 the costse in its advance. Major diameter 7, minor 6, height 3^ 

 mm. 



Type. — Australian Museum C. 3458. 



ffab. — Mount Gower, Lord Howe Island. 



A specimen dissected was not in a satisfactory state for examina- 

 tion, and I was only able to unravel the basal portion of the 

 genitalia (Fig. 13). This showed a greatly dilated reniform penis 

 sac on a long stalk surmounted by an equally long epiphallus ; 



* Kep. Horn Expl. Exp. i., 1896, p. 197. 



