MOLLUSCA EAST OF CAPE BYRON. 



53 



Mangelia emixa, .yj. nov. 



(Fig. 20). 



Shell fusiform, variable in contour, colour, and development 

 of sculpture. Whorls, five and a half, including a two-whorled 

 protoconch, rapidly increasing, slightly shouldered. Protoconch 

 smooth, glassy, globose. Colour variable ; sometimes entirely drab 

 or buff, often with the protoconch and the subsutural space darker. 

 The example figured has a ground colour of pale 

 cinnamon, banded or spotted with pale cream, 

 below the suture a band of chocolate, deep 

 within the inner lip a tinge of purple, proto- 

 conch a clear hazel-brown. Sculpture, longi- 

 tudinal wave ribs sharply bent near the suture, 

 fading away on the base, and leaving a bare 

 space behind the aperture, wider spaced above, 

 more crowded and irregular below ; on the 

 last whorl are fourteen, on the penultimate 

 eighteen. Both ribs and intei'spaces are crossed 

 by sharp, minute, close, waved, spiral grooves. 

 The flat-topped interspaces of these grooves, 

 four times their width, are again cross-cut by 

 close minute furrows into oblong beads. Aper- 

 ture narrow, thi-ee-fifths of the shell's length, 

 fortified without by a broad but low incurving 

 \arix, which rises above the suture, enclosing 

 a shallow sinus ; a layer of callus ovei'spreads the inner 

 Canal short and broad. Length, 11 mm.; breadth, -I'O mm. 



One specimen. 



I have long been acquainted with this species, though an 

 example perfect enough for description has hitherto evaded me. 

 The " Thetis " took it in 63-75 fathoms off Port Kembla ; in 

 50-52 fathoms off Botany Bay ; and in 22-38 fathoms oft' Port 

 Hacking. It occurred to me in 100 fathoms off Wollongoiig. 



In its immature state it has a general resemblance to Cythara 

 kubgensis, Petterd, from which the varix of the adult immediately 

 severs it. 



McDir/elin emina. 

 lip 



BaTIIVTO.AIA SAKCINULA, i^p. noV. 



(Fig. 21). 



Shell small, solid, ovate-fusiform. Colour, pale yellow, with a 

 rusty tinge at the suture. "Whorls, three and a half, including a 

 protoconch of one Hat wliorl. Sculpture, on the protoconch 



