GooDALiA. MOLLUSCA. MACTRADiE. 4S^ 



4. M. ewneata Ovate, smooth, depressed towards the front, anterior 



margin acute-angular.— .S'ojwr. Min. Conch, t. clx- f. 7 — In Crag. 



Gen. CXIII. GOODALLIA.— SheU 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. mmuttssima. — Shell with the inner margin plain. 



Mactra min. Mont. Test. Brit. Sup. 37— 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 wliich 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. vi. 



f. 1, 2, 3. 



Length i*oths, breadth ^^ilas of an inch ; pellucid, thin, white ; obscurely 

 wrinkled concentrically ; beak small, pointed ; inside with very fine longitu- 

 dinal striiE radiating from the hinge. 



456. L. nitidum. — Shell glossy, shghtly 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. 



