t ^3S ] . 
tiiofe of the tipuh ; and above thefe again, there ap- 
pears a fmali black tranfveiTal line. About the mouth 
there are feveral other little beards, fomewhat in the 
fliape of feet, which are conftantly in motion. 
There is no doubt but that thefe ferve to procure 
a free paifage to the water, and to carry the food to the 
animal’s mouth j which eniployment we can by no 
means affigm to the hinder legs, as Pvlr. Baker, 
Y/ho did not fee the parts concealed between the 
valves of the fhell, has done. 
The belly is almoft as broad as the bread, but has 
fcarce above half its length. The breadth decreafes 
towards the tail. When feen from before, the belly 
appears compofed of two conical lobes, marked in 
the middle with a black circle. It moves alternately 
to, and retires from, the bread. 
The tail comes out between thefe two lobes ; it is 
of the fame length with the body, and confids of 
two dreight white and tranfparent canals, which are 
joined together till towards the end, where they fe- 
parate, and each terminates in two curved points. 
Towards the middle of the tail, there is a little hard 
bridle, upon cadi of the canals. The animal com- 
monly keeps this hid under his bread and belly j nor 
have I ever feen it extend it, unleis when upon the 
point of wanting the necelfiry water, when the 
animal brings it out, to put himfelf in an eaher dtu- 
ation j after which, it is immediately drawn in back 
again. 
Upon the back of the in fed, are like wife feen two 
large round bodies, which I take to be the ovaria. 
No body, after this defcription, will dilpute the fu- 
periority which our bivalve infed has over the bivalve 
IhelMidi, 
