315 



Mangilia flaccida, Pritchard and Gatliff. 



Mangilia flaccida, Pritchard and Gatliff, Proc. Roy. Soc, 

 Victoria, 1899, a^oI. xii., p. 102, pi. viii., figs. 3 and 4. Type 

 locality — "San Remo, Western Port" ; ibid, 1900, vol. xii., p. 175; 

 Tate and May, Proc. Linn. Soc, New South "Wales, 1901, vol. 

 xxvi., p. 370, "Tasmania." 



Dredged in Gulf St. Vincent, 1 perfect ; in 40 fathoms 

 off Beacliport, 3 good ; in 55 fathoms north-west of Cape 

 Borda, 7 moderate. Taken on the beach at St. Francis 

 Island, 8 good, and at LeHunte Bay, Great Australian 

 Bight, 1 good. Identified by Mr. Gatliff. 



Mangilia picta, Adams and Angas. 



Mangilia picta, Adams and Angas, Proc. Zool. Soc, London, 

 1863, p. 419, pi. xxxvii., fig. 7. Type locality — '•Port Jackson 

 (and Soatli Aiistralia)'' ; Angas, Proc Zool. Soc, London, 1867; 

 Tryon, Man. Conch., 1884, vol. vi., p. 256, pi. xxii., fig. 72; 

 Sowerbv, Proc Mai. Soc, London, 1896, vol. ii., p. 29; Pritchard 

 and Gatliff, Proc. Boy. Soc, Victoria, (1899) 1890, vol. xii. 

 (N.S.), p. 173, "Victorian coast"; Tate and May, Proc Linn. 

 Soc, New South Wales, 1901, vol. xxvi., p. 370, "Tasmania." 



Mangilia inercdithice, Tenison-Woods, Proc. Rov. Soc, Tas- 

 mania, (1875) 1876, p. 142. Type locality— "Ba^ss Strait." 



The variations of this species make it very worrying. 

 The typical shell is easily recognized by its colour bands, 

 its bold ribs, and its fine spiral incisions ; but the ribs may 

 diminish to the vanishing point, the shape may vary to a 

 short, broad form or to a long, narrow shell, and the angu- 

 lation may become a rounded shoulder. 



The colour markings may disappear in turn, till the shell 

 is quite white, or may become narrow and numerous, so as 

 to band the whole body-whorl with thin brown lines, and 

 approach M. insctdpta, Adams and Angas, from which the 

 brown apex and the more decided incisions of the latter dis- 

 tinguish it. The most persistent ornament is that referred 

 to by Mr. Gatliff, the colour dashes immediately below the 

 suture, which are frequently crescentic and correspond with 

 the contour of the sinus. Another variation is a colouration 

 of the lower half only of the base of the body-whorl. 



Dredged from 8 to 22 fathoms in Gulf St. Vincent and 

 Spencer Gulf, and off St. Francis Island; also good in 110 

 fathoms off Beachport, and moderate in 200 fathoms. Taken 

 all along the coastline westward to Fowler Bay. 



Mangilia insculpta, Adams and Angas. 



Mangilia insculpta, Adams and Angas, Proc Zool. Soc, Lon- 

 don, 1863, p. 420, pi. xxxvii., fig. 8. Type locality— "Guli St. 

 Vincent"; Angas, op. cit., 1865, p. 160; Tryon, Man. Conch, 

 1884, vol. vi., p. 256, pi. xxii., fig. 61. 



