A KKVISION' 111' IHK AUSTKAMAN I'UIMUh.K IlKhl.KY. 277 



undulations, travei'se tlie ixjipei' whorls and vanish on the base ; on the 

 last wlioi'l these I'ibs, exclusive of tlie vaiix, ajnoimt to eight; these are 

 over-ridden by iiUernately larger and smaller dense spii-al thieads; on tlie 

 last wlioil, where the inteimediates are sometimes double, the major 

 threads amount to twentj-^-five ; all these threads carry very minute sliarp 

 and close grains. Apertui'e : — Varix very heavy and pi-omiuent ; sinus 

 broad, and expanding outwardly; canal short and open; inner lip with 

 ten entering i-idges, which continue in the throat; columella lip with nine 

 elongate tiiborcles. Length 15 mm., breadth 55 mm. 



This is like I'lenroloma crK.-^t'ildJinoii Reeve, but is iargei', and the libs 

 are more widely spaced. 



Ilah. Queensland : — 20 Fathoms, Darnley Island (type, Braziei-). 



KtKKMA CURTISIANA >•/). itdV. 



(Plate xlvii.. fig. 7t;.) 



Shell narrowly lanceolate, angled on the spire whorls. Colour uniform 

 ochraceous-buff. Whoils nine, including a protoconch of two smooth and 

 one keeled whorl. Sculpture : — The original keel gradually breaks up 

 iTito radials, vrhich on the tifth whorl appear as prominent, broad, tuber- 

 cular ribs, set at about nine to the whorl, peipendicular and discontinuous ; 

 these decrease in relative size, but increase in number till they amount to 

 twelve on the last whorl, sometimes splitting into riblets on the base; 

 fine spii-al threads, amounting to eleven on the penultimate and to about 

 thirty-three on the final whoi-l, are spaced on the periphery and crowded 

 towards the base and fasciole area. Aperture : — The varix is prominent and 

 expanded, toothed at the oral margin by the spiral sculpture ; columella 

 margin armed by four transverse plications ; both sinus and canal are 

 short and expanded. Length 9'5 mm., breadth 4 mm. 



This is related to E. !<pHrci( Hinds, differing from that bj- smoother 

 contour, more delicate sculpture, more numerous evanescent ribs, and 

 more numerous and finei' spirals. 



Hah. Queensland: — 7 fathoms. Port Cui'tis (type. Brazier). 



Ktrema densepi.icai'a Bunher. 



IhiUia deit>teplic(itii Dunker, Mai. Blatt., xviii., 1871, p. 159. 



Plenrotoma denseplicata Weiuka,Ti&, Conch. Cab., iv., Abth. 3, 1876, p. 107, 

 pi. xxiii., figs. 7, 9. 



t,'hifliiirelh( denseph'ciita Hedlej^ Proc. Linn. Soc. N.S.W., xxvii., 1902, p. 17. 

 /./. Pritchard and Gatliff, Proc. Roy. Soc. Vict., xviii., 1906, p. 50. 



ClathnreUa pltilomeiKt Tenison-Woods, Proc. Ro}'. Soc. Tasm., 1875 (1876), 

 p. 141. Id. Tate and Mav, Proc. Linn. Soc. N.S.W., xxvi., 1901, 

 p. 371. Id. Pritchard and^Gatliff, Proc. Roy. Soc. Vict., xii., 1900, 

 p. 177. Id. Verco, Trans. Roy. Soc. S.A., xxxiii., 1909, p. 307. 



