135 



<or replaced by flames extending axially in a zigzag way which 

 may be composed of narrow lines, and so approach C '. dictua. 

 The blotches may tend to coalesce spirally, and so approximate 

 C. vi net a, Tate. 



This form was sent to me some time ago from North 

 Tasmania under the name of G. achatina, Sowerby, the type 

 locality of which is Swan River. (Columbella achatina, 

 nobis, Sowerby, Thes. Conch., vol. i., 1847, p. 132, sp. 61, 

 _pl. xxxix., fig. 126.) The figure is 1 85 mm., and appears to 

 be drawn of the natural size. An exactly similar shell I 

 nave from Rottnest Island, off Swan River. Reeve's figure, 

 No. 54, pi. xii., Conch. Icon., is, however, 23*5 mm. long, 

 and no measurement is given : so if drawn of natural size 

 "this can scarcely be identical. 



Pyrene saccharata, Reeve. 



Columbella saccharata. Reeve, Conch. Icon., 1859, pi. xxix., 

 fig. 187. Type loealiti/ — Van Diemen's Land; Pace, Proc. Mai. 

 Soc, London, 1892 vol. v., pp. 131 and 132. 



Tryon, Man. Conch., 1883, vol. v., p. 125, makes it a 

 synonym of 0. semieonvtxa, Lamarck, and is followed by 

 Kobelt, Conch. Cab. (Ed. Kiister), 1897 (1892), Band iii., 

 Abt. i.D, pp. 81 and 82, No. 60.' 



Tate and May, Proc. Linn. Soc, New South Wales, 

 1901, vol. xxvi., part 3, p. 366, make it the specific name of 

 C. miltostoma, Tenison- Woods, and G. unisulcata, Kobelt, 

 giving Dr. Milligan's shells from Oyster Bay as the British 

 Museum types ; but Pace says these are not the types, but 

 "the Cuming Collection shells. Tate and May give a figure, 

 op. cit., pi. xxiv., fig. 19, of C. miltostoma as their C. 

 saccharata. The description of G. saccharata does not apply, 

 this has sulcations only over the base : in C. miltostoma they 

 are as shown in Tate and May's figure all over the body-whorl, 

 and especially just below the suture. 



This shell is translucent and unicoloured, and may be 

 typically pinkish : but it may be amber coloured, yellowish, 

 or white. 



It has been taken on the beach at MacDonnell Bay : in 

 12 fathoms off Porpoise Head, 2; in 16 fathoms off Tunk 

 Head,*l alive: in 17 fathoms Backstairs Passage, 9: in 20 

 fathoms off Newland Head, 1 alive ; in Gulf St. Vincent up 

 to 22 fathoms, 60 alive and dead ; in 40 fathoms off Beach- 

 port, 1 good, dead. 



The following variations may be met with in shells with 

 the same translucence, sculpture, and shape, and link it to 



