Sea Shells 
of New Zealand 
Plate X 
No. 1 
Plate X 
No. 3 
Plate X 
No.2 
Plate IX 
No. 18 
DOSINIA ANUS (dusenemos, stormy; anus, a ring).— 
A flat, heavily-built, circular bivalve of a pale fawn or 
biscuit colour, bluish or purplish near the hinges, with a 
dull surface, and sculptured with numerous and fine deeply- 
engraved regular ring-like striations. It is exceptionally 
thick and heavy. The internal markings for the adductor 
muscles and pallial lines are beautifully defined, the colour- 
ing being a delicate violet, the remaining portions white. 
The largest specimens are about three inches across. 
North and South Islands. Mount Maunganui. 
DOSINIA LAMBATA (dusenemos, stormy; lambata, 
licked, smoothened).—The shell of this species resembles 
that of the D. subrosea in shape, so closely that specimens 
of each should be placed side by side in order that the 
difference between them may be duly appreciated. In 
general outline it is fairly round, the beaks are small, close 
together, and bent forwards; the sculpture consists princi- 
pally of small and closely-set concentric striations. The 
chief points which distinguish it are as follows:—The 
length is almost identically the same as the breadth; the 
thickness between the two valves is relatively greater than 
in the D. subrosea; the dorsal margin on the posterior 
side of the beaks has a more rapid slope. There are faint 
radiate striations on the valves, which result in a somewhat 
granular finish. As these are very faintly defined, they 
should be examined through a lens. The valves are thin, 
white, and about an inch in diameter against the two-inch 
diameter of the D. subrosea, and the three-inch diameter 
of the D. anus. 
Found at Monganui; Bay of Islands; Hauraki Gulf; 
Auckland Harbour; Queen Charlotte Sound. 
DOSINIA SUBROSEA (dusenemos, stormy; sub, un- 
der, slightly; rosea, pink, rosy)—A bivalve similar in 
shape to the D. anus, but much thinner, and of a pale pink- 
ish white, or pale burnt sienna, instead of biscuit colour; 
polished, and having the concentric striations so small, 
fine, and closely set together that it appears to have a com- 
paratively smooth surface. It may attain a length of two 
inches, and is not uncommon. 
North and South Island. Mount Maunganui. 
MACROCALLISTA MULTISTRIATA (makros, long; 
kalos, beautiful; multistriata, having many striations).—A 
small and rather thin bivalve of beautiful shape and colour, 
found only in deep water. It is obliquely narrowed, oval, 
elongated, with both ends somewhat drawn out, and having 
the valves sculptured with many small but well-defined 
104 
