344 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. VIII. 
Of the genus Standella there seem to be two species—S. capillacea 
(Desh.) and S. pellucida (Chem.), but the hinge-teeth and ligament- 
pit are so exactly alike in both cases that I am in some doubt, 
from a recent examination of a number of specimens, as to 
whether we have or have not two species. If we have, S. capillacea is 
much the larger, rough, oval, and inequilateral, white or more often 
tinged with rusty-yellow, rough, and irregularly concentrically 
striated with lines of growth and fine wrinkled striations in a radiate 
direction, especially towards the ventral border. 
Size 33” x 23". 
S. pellucida is much smaller, and the oval shape is more pointed. 
Shell shining white and silkily, very finely, concentrically striated. 
Radiate wrinklings not present, 
Size 22" X 13". 
MYACHA. 
The Bombay specimens of this family are so widely different in 
form that they must be taken separately, 
Thracia salsettensis has been described and figured by Mr. 
Melvill, and a copy of his diagram and pamphlet has been reproduced 
in this journal. 
Anatina labsata (Reeve) is an extremely fragile oblong some- 
what swollen, pearly-looking shell ; semi-transparent; interior vitreous, 
and with a single spoon-shaped projection to hold the internal ligament, 
The shorter side of the shell is rostrated or slightly thrown back, 
causing it to gape. 
Solen truncatus (Sow.)—(The razor shell)—is very common ; the 
double shell forms a long cylinder open at both ends, often covered 
with a greenish epidermis. Shell tinged with rusty-pink often trans- 
versely banded with this colour. 
Length 3" to 7". 
PHOLADACEA. 
One species, Pholas baker: (Desh.), is certainly common, and I 
believe these shells have been called angels’ wings, the imaginary 
drawings of which they faintly resemble. A very elongated, pure 
white, thin and brittle shell concentrically and radiately roughly ridged, 
the ridges forming sharp points at the junction. At the umbo the shell 
is curled over on itself, a very marked feature. Interior porcellanous. 
Length about 3" x1". 
