286 



and subdistant axial bars. Genei'ally the second is swollen 

 and lies somewhat out of the axis of the shell, causing the 

 mamillate form. Rarely the first whorl may be as large as 

 the second. This j^i'otoconch seems comj^lete, and not the 

 base of a spiculate jDi'otoconch, whose terminal whorls have 

 fallen. The shell varies in shape, being short, broad, and 

 pupseform, or long, narrow, and elongate-pyramidal. 



Dredged in Gulf St. Vincent, 7 perfect and 7 poor; in 

 90 fathoms off Cape Jaffa, 2 good : in 150 fathoms off Beach- 

 port, 2 j.^oor. Taken on the beach MacDonnell Bay, 1 : Gulf 

 St. Vincent, 23, in varying condition : Venus Bay, 2, good. 



The very different protoconch makes me diffident about 

 calling this a variety, inasmuch as the characters of the pro- 

 toconch are generally regarded as very certain specific diag- 

 nostics ; biit the siiells are otherwise indistinguishable. 



Triphora g^ranifera, Brazier. 



Triforis graniferiis, Brazier. Proc. Linn. Soc, New South 

 Wales. 1894, vol. ix.. 2nd ser., p. 173, pi. xir., fig. 10, Port 

 Jackson. 



Tripliora granifera, Brazier. Hedley, op. cit., 1903 (1902), 

 p. tJlO. pi. xxxii., figs. 28 and 29; Pritcliard and Gatliff, Proc. 

 Roy. Soc, Victoria, 190(3 (1905). vol. xviii. (X.S.), p. 60, Wes- 

 tern Port. 



Taken on the beach from MacDonnell Bay to Scales 

 Bay, and St. Francis Island. Dredged in 6, 14, 20, 22 

 fathoms in Gulf St. Vincent and off St. Francis Island, alive r 

 in 35 fathoms oft' St. Francis Island, 3 poor ; 'in 40 fathoms- 

 off Beachport, 4 good, 11 poor ; in 62 fathoms oft' Cape Borda, 

 3 poor; in 110 fathoms off Beachport, 2 moderate; in 130 

 fathoms off Cape Jaffa, 1 moderate ; in 300 fathoms off Beach- 

 port, 1 good and 1 moderate. This appears to be a littoral 

 form, extending up to 22 fathoms : beyond that depth the 

 shells are mostly dead and decolourized. 



The length of the type is 4 mm., but it may be 5"7 mm. 

 or 2'9 mm. Sometimes tlae shell has the lowest pearl row the 

 largest, and the highest the smallest, so that the whorls are 

 imbricating or pagoda-like. Sometimes the supra-sutural 

 threadlet stands out as a "distinct low, small pearl row. One 

 adult micromorph has the lowest pearl row relatively very 

 large, so as to suggest T. pf^'iffri'i , Crosse, but the short, thick 

 figure is that of r/ rani f era. The South Australian shells are 

 verv rarely wholly dark- or light-brown like the Sydney speci- 

 mens, but are a glistening, translucent white, with brown, 

 squarish blotches. These may be quite dark or very pale, 

 large or small, few or many, so as to make the shell nearlj^ 

 white or nearlv brown. 



