28 
T. Navaris. Lin. 1267.—Dil. p. 1089.—Pen. 4. 
p. 147.—Mont. 527..—T. Biv. 14. t. 2. f. 1, 2,3.—F. 
p. 404.—Lam. 1.—Sow. G.—Reeve. t. 21.—Tube 
more or less flexuous and tapering, semi-concamerated 
near the smaller end; pallets spoon-shaped, convex on 
the outside and concave within, terminating at one end 
in a linear elongation which is straight or a little flexu- 
ous, and truncate at the other; valves ear-shaped 
behind, one with a curved denticle on the margin above 
the teeth. Diam. 4. In timber. 
T. BrpennatTa. Turton, Dic. 184. t. 11. f. 38, 39, 
40.—T. Biv. 15.—F. 454. Gray. Phil. Mag. 1827.— 
Tube thicker and stronger, not at all concamerated ; 
pallets very long and slender, somewhat curved and 
feathered on each side; valves ear-shaped behind, ob- 
long, reflected on the outer margin and detached all 
round the circumference on the under side, an oblique 
rib on the margin above the teeth. Diam. ¢. Exmouth. 
T.Matreouts. Turt. Biv. p. 255. t, 2.f.19.—F.p. 
454.—Tube consisting of a slight testaceous deposit on 
the surface of the chamber, the termination of which is 
slightly concamerated ; valves ear-shaped behind, auri- 
cles reflected, pallets transverse and mallet-shaped ; 
strie on the triangular processes remote. Diam. ¢. 
Torbay. 
