WASHINGTON CLAM. 
55 
times living two feet below the surface of the 
mud. For such a situation it is provided with 
an enormous siphonal tube through which it 
pumps water from above. This species is used for 
food, and a few of them are sufficient for an ex- 
cellent chowder. The shell is oblong, bulged, 
rather thin, and gapes widely where the siphons 
pass. The hinge teeth are small ; the ligament 
is large, internal, and lodged in a triangular pit. 
The pallial sinus is very broad and deep, the 
lower part of it joining the ventral line. Exter- 
nally the shell shows only rough lines of growth, 
and is sometimes covered with an epidermis. It 
delights in muddy bays, and sometimes grows 
to a length of ten inches. 
The .bodega Tellen, Tellina JBodegensis , Hinds, 
Fig. 1, PI. XV, is a very pretty sand-loving 
shell, smooth, thick, and heavy, and is about two 
inches long. The surface is polished, of a 
creamy white color, and marked with tine con- 
centric lines. The posterior extremity of the 
shell is narrow, and somewhat bent to one side. 
The ligament is external, the hinge teeth are very 
small, but the pallial sinus is long and narrow. 
Old specimens show a tendency to thicken the 
shell from the inside. 
Fig. 2, PI. XV, represents the little shell so 
often found in the sand near the Cliff House, 
named Macoma inconspicua , Br. & Sby. It is 
a thin, flat, pinkish little shell, about half an 
inch long. A variety is white and larger. 
Macoma secta, Conr., has a very thin, white, 
plossy shell, sometimes faintly marked with red. 
The ligament is short and strong placed just 
