291 



Dredged in 40 fathoms off Beachport, 43 perfect or very 

 good j in 55 fathoms off Cape Borda, 23 poor ; in 90 fathoms 

 off Cape Jaffa, 4 poor; in 110 fathoms off Beachport, 1 good, 

 4 moderate, 1 poor ; in 130 fathoms off Cape Jaffa, 4 moder- 

 ate ; in 150 fathoms off Beachport, 1 good; in 300 fathoms 

 off Beachport, 1 poor. 



While quite a rare shell on our beach, if present at all, 

 it is comparatively common at 40 and 55 fathoms, where it 

 is in good condition and quite typical in sculpture and col- 

 ouring. When adult the shell may vary from 9 mm. to 5*25 

 mm. in length. In the perfectly-formed mouth, which is 

 rarely seen, the posterior gutter is converted into a round 

 orifice by the forward growth of the margin of the aperture 

 and its application to the sutural spiral beyond the sinus, 

 and the basal part of the anterior canal is closed by contact 

 of the projecting spur of the basal lip with the anterior part 

 of the inner lip. The applied parts do not appear to actu- 

 ally coalesce, so as to form absolute tubes, but they produce 

 three distinct apertures. 



Var. lilacina, var. nov. 



This is a very pretty variety, with a delicate lilac tint on 

 the apex and a spiral of lilac tubercles above the suture ; 

 the rest of the shell is light-brown. That it is only a variety 

 appears from the sculpture of the apex ; the adult mouth 

 when perfect with the three apertures, and the brown spots 

 between the pearls of the lowest spiral. It may reach 11 

 mm. in length, without an adult mouth. Sometimes the lilac 

 tint is absent and replaced by white. It is referred to by 

 Mr. Hedley in his paper quoted above. 



Dredged in Gulf St. Vincent, 10 good ; in 40 fathoms off 

 Beachport, 15 quite fresh ; in 55 fathoms off Cape Borda, 12 

 good, 5 poor. Taken on the beach. Gulf St. Vincent, 3 good ; 

 west coast of South Australia, 3 good ; St. Francis Island, 

 12 good. 



Var. nivea, var. nov. 



This variety is pure-white ; its protoconch and sculpture 

 are those of T. tasmanica, Tenison-Woods. The protoconch is 

 well preserved, and is slightly mamillate. The first whorl 

 begins in the centre, and has slight axial lirae leading to a 

 row of beads, and below this is a beaded carina ; in the sec- 

 ond whorl are two beaded carinas. There is no evidence of 

 any earlier protoconch having broken off. In a very large 

 number of examples of T. tasmanica in various stages of 

 growth, no individual, however immature, has been observed 

 with a pointed protoconch. 

 j2 



