MOLLUSCA — IIKDI.KY 



367 



fioiu 7"5 to 5 mm.; the colour pattern from the ornato form fij^'uicd 

 by .\ngas to pure white ; while the lip may be smof)tli us described 

 by Woods, or denticulated as slated by Aiij^'as. The nanu; 

 }ita)iislas may be retained in a varietal sense fur the large white 

 form which in warmer latitudes is r(>stricted to deep water. 



Tn G3-75 fathoms oil" Port Kem!)!a. 



MARGINELLA STILLA, sp.nov. 



(Fig. 90.) 



Station 49. 



spire. 



Shell drop-shaped, solid, flossy, with slightly elevated 

 Colour: the dorsal surface cream, varix 

 and ventral surface white. Whorls 

 four. Aperture narrow ; outer lip 

 with a strong varix, mounting to the 

 suture of the penultimate whorl, within 

 finely denticulate, columella with four 

 well developed teeth. Length 5, 

 breadth 2-5 mm. 



M. agapeta, Watson, which I have 

 not seen, must resemble this, but that 

 has a different shape and three 

 columella plaits. There is a variety 

 of Af. stilla in which the spire is more 

 depressed than in the type figured, so 

 that the length of the shell hardly 

 exceeds that of the aperture. Fig. 90. 



Apparently this is a common and widely distributed species 

 on the continental shelf. The "Thetis" took it in 63-75 fathoms 

 off Port Kembla, and it was previously obtained in 24 fathoms 

 ofi" Cabbage Tree Island, Port Stephens. 



MARGINELLA STRANGEI, Any as. 



Marginella strangei, Angas, Proc. Zool. Soc, 1877, p. 172, pi. 

 xxvi., f. 8. Id., Hedley, Proc. Linn. Soc. N.S. Whales, xxvii., 

 1902, p. 18, text figure. 



Stations 28, 49. 



From 22 fathoms off the Manning River, and from 63-75 

 fathoms off Port Kembla. Previously taken in 24 fathoms off 

 Cabbage Tree Island, Port Stephens. 



