266 TELLINA, TENEBRIG. 
9—3. Tevumna. Spec. 100. 
Section A. Ovate and thickish. 
fragilis, (brittle tellina,) shell ovate, white ; gib- 
bous with transverse recurved striz ; beaks 
_ yellowish. An inch broad. 
Section B. Ovate, compressed. 
radiata, (radiated tellina,) shell oblong, with faint 
longitudinal striz, polished ; suture behind the 
beaks caniculate; whitish with red rays. Some- 
‘times with unequal sides, large, white, brown, 
yellow, &c. 
Section C. Suborbicular. Genus Cycras of 
Bruguicres. 
similis, shell suborbicular, convex, base a little 
flattened ; having nearly equi-distant raised 
concentric lines, giving a furrowed appearance 
to the surface ; epidermis brownish ; hinge with 
minute oblique teeth, lateral ones distinct, elon- 
gated. Length the third of an inch, breadth a 
- qittle less. American fresh water shells. } 
dubia, shell oblique, subovate, convex, wrinkled 
concentrically, whitish with a darker band ;: 
beaks nearer one end, whitish within; primary 
teeth distinct, two divaricating ones in one 
» valve, and in the otherone. Length one-fourth 
of an inch, and breadth a little less. American 
fresh water shells. 
See MS. P. 
8—5. Tenxresrio. Spec. 90. 
moitor, (meal worm,) eblong, piceous ; shells 
