! 
287 
: Z Spee a 57 
eee 7 iiaskan na Bd 
WNotore ni a Veiphora pfeifieri, Crosse and Fischet 

Triphoris pfeifferi, Crosse and Fischer, Jour. de Conch., 1865, 
p. 47, pl. i., figs. 14 and 15. Type locality—Gulf St. Vincent. 
Triforis pfeijferi, Crosse and Fischer, Tryon, Man. of Conch., 
vol. ix., 1887, p. 182, pl. xxxviii., fig. 9; Tate and May, Proc. 
Linn. Soc., New South Wales. 1901, vol. xxvi., p. 888. Tasmania; 
Pritchard and Gatliff, Proc. Roy. Soc., Victoria, vol. xiv. (N.S.), 
1902, p. 86, Victoria. 
Taken on the beach as far west as Venus and Scales 
Bays, and on St. Francis Island. Dredged at 6, 15, 20, 22 
fathoms, alive, in Gulf St. Vincent, etc.: in 40 fathoms off 
Beachport, very many good: in 55 and 62 fathoms off Cape 
Borda, 2 perfect, 2 fresh, 5 good; in 90 fathoms off Cape 
Jaffa, 1 perfect, 3 poor; in 110 fathoms off Beachport, 8, all 
broken ; in 130 fathoms off Cape Jaffa, 2 good: in 150 fathoms 
off Beachport, 4 poor. It is very abundant on the beach and 
is manifestly a littoral shell, and certainly lives up to 22 
fathoms, and may live up to 90 or 100. 
The authors say “the first three whorls are smooth.” The 
protoconch is of four convex whorls, with a central carina 
and crowded axial lire, and a well-marked suture. The 
Jength of an adult shell with ascending suture and completely 
formed mouth may be 9°5 mm. or 37 mm. 
It varies very greatly. When the supra-sutural ledge is 
wide, but not projecting, the middle row of pearls is larger 
than usual, and the upper row smaller than usual, an im- 
bricating or pagoda-like shape is assumed. When the supra- 
sutural ledge is well marked and nodulated, so as to look 
like a pearl row, and the highest pearl row is small, and the 
middle row is scarcely seen, and the lowest is very large, 
this may appear to be a large central row between two smaller 
rows, and may, as Hedley suggests (Proc. Linn. Soc., New 
South Wales, 1903 (1902), p. 616), be 7. scitulus, A. Adams, 
which we have not been able to identify among South Aus- 
tralian shells. Sometimes the shell is typically nacreous- 
white, with the violet-brown base, and the supra-sutural 
ledge articulated brown and white; but it may be almost 
throughout of a dark-violet-brown or any intermediate tint. 
The mouth in Crosse’s type appears not to have been 
complete. The outer lip ascends beyond the supra-sutural 
ledge so as to touch the lowest pearl row. Here it is pinched 
so as to form a gutter, and retires to form a notch. It is 
antecurrent towards the base and somewhat effuse, and crosses 
the base of the canal as a spur, so as to meet an erect rather 
thick inner lip. 
