Sea Shells 
of New Zealand 
Plate XI 
No. 13 
Plate XI 
No. 14 
Plate XI 
No. 15 
threads. It is somewhat kidney-shaped, and possesses a 
triangular resilifer, or cartilage-bearing process under the 
beaks in the interior. Found on the under surface of. 
boulders at extreme low tides and to a depth of thirty 
fathoms of water. 
Hauraki Gulf; Mount Maunganui; Cook Strait; The 
Snares; Chatham Islands. 
TELLINA ALBA (tellina, Greek name for a kind of 
mussel; alba, white) —The white Tulip shell. A very thin, 
semi-transparent bivalve, marked with minute concentric 
striations externally, which give the shell a satiny sheen. 
It is a pure white outside, and of a bluish and glossy white 
inside. One end, the anterior, is rounded in outline, while 
the posterior end is angular and bent. It is about an inch 
and an eighth high, and an inch and five-eighths long, 
Found washed up on sandy beaches. North and South 
Islands. Mount Maunganui. 
TELLINA DELTOIDALIS (¢ellina, Greek name for a 
kind of mussel; Delta, the Greek letter A 3; oidos, like).— 
A more solid, rather large, white or yellowish-white Tulip 
shell, which is more chalky than translucent; the anterior 
end is semi-circular in outline, the posterior end angular. 
Towards the hinges the valves are of a rather yellowish 
tinge. The sculpture consists of the concentric striations, 
and there is a well-marked groove on the left valve and a 
ridge on the right, towards the posterior angle. It is about 
two and a-quarter inches long by two inches in height; 
practically as broad as it is long. Found on sandy spits 
in harbours. 
Bay of Islands; Hauraki Gulf; Mount Maunganui; 
Wellington and Dunedin Harbours. 
TELLINA DISCULUS (tellina, Greek name for a kind 
of mussel; disculus, dim. of discus, a quoit, a flat round 
plate)—A moderately thick yellowish or greyish-white bi- 
valve, translucent, but not so much so as the T. alba or 
the T. deltoidalis. In outline the valves are fairly rounded, 
but the anterior end is more semi-circular, while the pos- 
terior end is somewhat angled, with a groove on the left 
valve and a ridge on the right. The umbones are coloured 
a bright orange yellow, which is also present on the interior 
surface. It is an inch and three-eighths long by an inch 
and a quarter high. 
ye ae Maunganui; Banks Peninsula; Chatham Is- 
ands. 
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