Goodalia. MOLLUSCA. MACTRAD.E. m 
4. M. cuneata . — Ovate, smooth, depressed towards the front, anterior 
margin acute-angular.-*-*S'oz4?er. Min. Conch, t. clx. f. 7* — In Crag. 
Gen. CXIII. GOODALLIA. — Shell triangular, equivalve 
inequilateral, closed ; hinge with two teeth in one valve, 
and a triangular cavity between them ; in the other valve 
a single tooth ; a lateral simple tooth in each valve on the 
produced side. 
453. G. triangularis. — Shell with the inner margin toothed. 
Mactra tri. Mont. Test. Brit. 99. t. iii. f. 5. — G. tri. Turt. Biv. Brit. 77- 
t. vi. f. 14 — English and Irish coasts. 
Length 2 lines, breadth 3 lines ; strong opake, smooth, white ; beaks pro- 
minent, obtuse. 
454. G. mmutissima.- — Shell with the inner margin plain, 
Mactra min. Mont. Test. Brit. Sup. 3T.^G. min. Turt. Biv. Brit. 77* 
t. vi. f. 15 Coast of Devon and Cornwall. 
This species resembles the preceding, but the shell is not quite so angu- 
lated, nor so long in proportion to its breadth ; nor has it ever occurred so 
large. 
Gen. CXIV. LEPTON. — Shell flat, nearly orbicular, equi- 
valve inequilateral, a little open at the sides ; hinge of 
one valve with a single tooth and a transverse linear lateral 
one on each side of the other valve ; with a cavity in the 
middle, and a transverse, deeply cloven, lateral tooth on 
each side, the segments of which divaricate from the 
beak. 
455. L. squamosum. — Shell punctured in a scale-like man- 
ner. 
Solen squam. Mont. Test. Brit. 565. — L. squam. Turt. Biv. Brit. 62. t. vL 
f. 1, 2, 3. 
Length v^ths, breadth j®oths of an inch ; pellucid, thin, white ; obscurely 
wrinkled concentrically ; beak small, pointed ; inside with very fine longitu- 
dinal striae radiating from the hinge. 
456. L. nitidum. — Shell glossy, slightly Striate transversely. 
Turt. Biv. Brit. 63.... From corallines, in Torbay. 
Shell half the size of the last, which it resembles in shape and hinge, but 
is of a lucid, pale, glossy horn-colour, without punctures^ 
