313 



St. Francis Island, 3 quite fresh; 35 fathoms, 1 dead; 55 

 fathoms oft" Cape Borda, several dead; 110 fathoms off Beach- 

 port, 2 dead. 



Mangilia impendens, n. sp. PI. xxvii., fig. 3. 



Shell solid, white, of 7 whorls, including the blunt pro- 

 toconch of 2 smooth depressed convex turns. Spire-whorls 

 sloping, swollen above the linear somewhat undulating suture, 

 and barely swollen below it. Base slightly contracted. Aper- 

 ture oblong-oval, narrower behind, widely open in front, with 

 a shallow notch. Outer lip simple, sharp, thickened by a 

 marked varix outside, which ascends roundly at the suture 

 and botinds a shallow, wide posterior sinus, profile convex, 

 barely sinused anteriorly. Axial costse roundly trigonal, sin- 

 uous, undulating the upper suture, most valid at the swell- 

 ing of the whorl, half as wide as the interspaces, vanishing 

 towards the base, and becoming obsolete towards the aper- 

 ture. Very crowded spiral incisions all over, and still finer 

 sinuous axial growth scratches, finely granulating the sur- 

 face. 



Dim. — Length, 6'4 mm. ; of body-whorl, 44 mm. ; 

 breadth, 2'5 mm. 



Localitt./. — Type dredged in Gulf St. Vincent, with 23 

 others : 14 fathoms off Ardrossan, 1 alive ; in 24 fathoms off 

 ITewland Head, 1 dead. 



Diar/nosis. — It approaches M. hexagnnalis, Reeve, but 

 this is a longer shell, with a sharp three- whorled 

 brown protoconch, and with straighter, narrower ribs, and 

 miich more numerous spiral incisions. 



Mangilia hexagonalis, Reeve. 



Pleurotoina hexo.goualis. Reeve, Proc. Zool. Soc, London, 

 1845, p. 118; also Conch. Icon., 1845, pi. xxxii., sp. 293. Type 

 locality — ''Philippines." 



Mangilia hexagonalis. Reeve, Tryon, Man. Conch., 1884, 

 vol. vi., p. 251, pi. XX., figs. 1, 4; Sowerby, Proc. Mai. See, 

 London, 1896, vol. ii., p. 30, "Gulf St. Vincent." 



Dredged in 9, 10, 12, 14, and 20 fathoms in Gulf St. 

 Vincent and Spencer Gulf, alive, rare. Taken on the beach 

 at Aldinga (Kimber). 



Mangilia alticostata, Sowerby. 



Mangilia alticostata, Sowerby, Proc. Mai. Soc, London, 

 1896, vol. ii., p. 31, pi. iii., fig. 16. Type locality— "Guli St. 

 Vincent';; Hedley, Proc. Linn. Soc, New South Wales, 1901, 

 vol. XX vi., p. 17, "Port Jackson." 



Dredged in 12, 14, 15, and 20 fathoms in Gulf St. Vin- 

 cent, rather rare : taken in Wallaroo Bay (Dr. Gosse) : in 



