62 
it is blotched grey and white. The characteristic spicules, 
before described, are present in all my South Australian 
lateral areas; the posterior margin is more strongly toothed 
than is the case with the larger specimens. Dr. Torr has 
several of the smaller size that show the same pustulose charac- 
ter in the sculpture. A specimen 30 mm. in length, dredged 
in St. Vincent Gulf, exhibits the same “spear-headed” hairs, 
and a small one, 23 mm. long, preserved in spirit, collected 
at Aldinga Bay, has the girdle well clothed with hairs 
terminating in similar "spear-head'' spicules. 
emarks.—All specimens examined, collected by Dr. 
Torr, Dr. Verco, and myself, show the "spear-headed" spicules, 
and none of those examined from the other States exhibit this 
character. 
The coarse hairs on the girdle are branching, and are, 
where perfect, transparent at their apices, but the transparent 
idth as the hairs and evidently the 
ge 
o 
a 
me 
"o 
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un 
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H 
i: 
ct 
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closely-packed wavy ribbing. In one specimen in my collec 
tion from Sydney Harbour, the closely-packed wavy ribbing 
prominent tubercles are either eroded or absorbed. An ye 
Specimens that have come under my notice are more olivaceous 
than uet South Australian shell. t low 
: abitat.—The t I collected in shallow water a 
tide at the Nine d Station, Sydney, New South Wales, 
in November, 1918. I presenting same to the Se 
Australian Museum. It appears fairly common at i 
Jackson, and frequents much shallower water than is the eme 
: with the South Au ian species. I actually found one or 
a large rock several feet above low-water mark. I have EE 
