A REVISION OF IIIR AITSTRAMAN TCKRin.lC HEKI.EY. 269 



Cithont li/rira Schepman, Siboga Exped. Monogr., xlixe., 1913, p. 485. 

 /(/. Melvill, Proc. Malae. Soc, xii., 1917, p. 181, pi. x., {\<r. 8. 



(^ythara ci/liiuin'cn vai-. Iijn'r,( Sniith, Zool. Coll. "Alert," IHSI, p. -il, 

 pi. iv., fig. H. 



Hub. Queensland: — 7 fathoms, Port Curtis (Coppiiiger). 



EUCITHARA MONOCHKRIA .sp. ywv. 



(Plate xlvi., fig. 63.) 



Shell small, stout, solid, biconioal. Colour russet-brown, with a 

 definite buff band on the shoulder covering three spirals, and a less 

 definite buff band on the base; penultimate, antepenultimate whorls, and 

 varix also buff. Whorls six and a half, of which two and a half compose 

 the sharply differentiated protoconch. Sculpture : — The earlier whorls of 

 the protocouch are smooth, and the last has about twenty delicate radial 

 riblets ; the ribs on the adult shell are broad, pi'oniineiit, perpendicular, 

 and discontinuous, at first eleveii, at last nine ; both ribs and intei'stices 

 are traversed by flat-topped elevated spirals, spaced more than their 

 breadth apart, on the last whorl twenty-five, on the penultimate eight; 

 the spirals are grained by the passage of fine radial strise. Aperture : — 

 A substantial varix stretches a free limb over the mouth ; beneath it are 

 six small tubercles ; on the inner lip are ten entering plaits. Length 

 5 mm., breadth 2 mm. 



Hub. Queensland: — 5 to 10 fathoms, Hope Island (type, self). 



EUCITHARA MORARIA sp. nov. 



(Plate xlvi., fig. 64.) 



Shell small and subcylindrical. Colour blackish brown, the apex and 

 bands on the lip buff. Whorls seven, the upper short, well rounded, the 

 last flatter, half the length of the shell. Sculpture : — Riblets are set at 

 the rate of about eighteen to a whorl, more than the bi'eadth of each 

 apart, incurved at the suture, those above more prominent, on the last 

 whorl decreasing in height, and gradually vanishing on the base ; both 

 riblets and inter-costal spaces are closely encircled by alternately larger 

 and smaller threads, which are in turn grained by finer radial lines. 

 Aperture narrow ; well developed external varix, slightly incised by 

 posterior notch ; within the outer lip are a few small denticules, and on 

 the inner lip fourteen short entering ridges. Length 9 mm., breadth 

 35 mm. 



This species is a relation of E. cylindn'ca, from which it is distin- 

 guished by dentition, colour, coarser sculpture, and blunter extremities. 



Hab. Queensland : — Annam River bar (type, self); 13 fathoms. 

 Princess Charlotte Bay (Brazier). 



