THE COMMON MARINE SHELLS OF THE BOMBAY SHORE, 218 
family a place by itself, and as the only member of it lives alongside 
the Littorinide I take them together. 
Planazis sulcatus (Born.) has been already spoken of. The shell is 
small, thick, dark, and smooth with light streakings, and is strongly 
spirally grooved ; whorls 4 to 5; columella flattened, and outer lip of 
mouth ridged inside. 
Littorina ventricosa (Phil.) and L.malaccana (Phil.).—These are two 
minute shells to be found living on the boulders of our shore, even 
above the reach of all tides. L. ventricosa is Natica shaped, dull yellow 
or grey, with incised lines running spirally round the shell. 
L. malaccana is black or dark grey, and easily known by the double 
row of white nodules round the centre of the whorls. 
Division III, 
STROMBIDA. 
There is only one member of this family at all common, the Rostel- 
laria curta (Sow). It is a long tapering shell of 5” to 6”, smooth and 
shining ; colour yellow to brown ; outer lip of mouth flattened and 
toothed, and a long pointed canal at the base. 
DOLIDA. 
Dolium maculatum (Lam.).—The largest and perhaps handsomest 
shell we have, and sometimes bigger than a cricket ball. Last whorl 
nearly envelops the whole shell, and mouth very large; colour white 
with a touch of purple-grey ; raised bands encircling the shell with 
brown interrupted blotches ; shell thin, polished, and somewhat trans- 
parent, 
TRITONIDA, 
Ranella tuberculata (Brod.),—Common and easily known by the two 
opposite varices or ridges running from apex to base, and giving the 
shell a flattened appearance; whorls 7 to 8, spirally, tubercularly, 
ridged ; mouth rounded and canal distinct; colour dull brown ; 
when dead reddish-yellow and shining. 
CYPRAID A.—Tuer Cowrexs, 
The shape of these shells is so well known as to need no description. 
All highly polished and rarely obtained as dead shells in a sufficiently 
perfect state for identification, 
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