134 



4. A jDeripheral spiral of white spots, the oblique lines ; 

 above this thickened at intervals to form ragged brown axial 

 flames. 



5. Purple tinted. 



6. A broad amber band over the lower three-fifths of the 

 spire-whorl ; a white band below this, from the level of the 

 suture on the body-whorl ; below this a somewhat fainter one 

 on the base ; the amber bands formed of very crowded oblique 

 spiral lines. 



They have been dredged in 17 to 22 fathoms in Back- 

 stairs Passage, 16 alive or in good condition; in Gulf St. 

 Vincent and Spencer Gulf at unrecorded depths, 5 dead; and 

 taken on the beach along the South Australian coast and on 

 St. Francis Island. Comparatively rare. 



The Yincta form may vary as follows : — 



1. The dark band on the spire- whorls may reach the 

 anterior suture. 



2. There may be a white band between it and the suture. 



3. The band may be scalloped, behind only, or in front 

 also ; the posterior white bands may be interrupted by the 

 points of the scallops reaching the suture. 



4. A second revolving broad band, generally lighter in 

 colour, usually occurs on the front of the body- whorl, and 

 may be quite separated from the first by a white band, or 

 united at intervals by the points of the scallops. 



5. There may be numerous axial hair lines from the 

 band, back to the suture, and forward to the base. 



6. There may be a single dark-brown band at the pos- 

 terior suture, fading out anteriorly, and there may be in 

 addition a double narrow line at the periphery. Middleton 

 (Miss Stow). 



The maculated form : — 



This is the shell which was recorded in Adcock's Handlist 

 of Aquatic Moll, of South Australia, 1893, p. 5, No. 117, as 

 C. Tayloriana, Reeve, albomaculata, Angas ; but it was a mis- 

 identification, and is a variety nearly allied to C. vincta, 

 Tate. 



1. It has a row of dark-brown blotches on the spire- 

 whorls, a second row just in front of the periphery on the 

 body- whorl, and a narrow infrasutural row of white spots. 

 Gulf St. Vincent, (?) depth, 1 dead: Edithburgh rocks, 

 many alive. 



2. The second row of blotches may be absent. Gulf St. 

 Vincent, (?) depth, 1 alive, 7 dead: Edithburgh rocks, alive;: 

 Venus Bay, 1 ; Beachport beach, I. 



3. There may be a white-and-brown peripheral spiral, 

 and the blotches may be broken up into short spiral splashes,. 



