Hinges of Briiijh B'lVjhe Shells, 157 



Tab. XIV. Fig. r, 2. 



A thick, broad, upright, Ariatcd tooth in the upper 

 valve*; ia the lower valve, a deep, fpoon-fliaped 

 hollow, with a fsnall tooth on one fide, and a fliarp 

 ridge on the orhcr, running from the beak towards 

 the truncated end. 



Lifter, in his HJioria A?timaIiHm y/^//>, has fi2;nred the 

 lower valve of this fhell, but has totally miftaken 

 the foroi of the tooth. 



Da Cofta, in his Briti/}j Conchology^ and likewife in 

 his Elements^ has fucceedcd better, although his 

 figures are by no means perfect:. 



arenarla, Linn. Sv/l. Nat. ed. Gmel. i. p. 32 iS. Penn. Br. Zool, 



No. 16. /. 42. f. 16. Li/9. Conclj. t. 41S. /. 262. — 

 Bajl. Opufc. fub/, 2. p. 69. /. y. J. 2, 3. yirgetrc. 

 Zoom. t. 5. y. 10. 



T,vB. XIV. Fig. 3, 4. 



Hinge with an upright, fanftiared tooth ; on the fule^ 

 a ridge deeply fulcated ; lower valve like tiie f-reccd- 

 ing, except the fide tooth, \j'hich ia fcarcel)' to be 

 dirtinguiflied. 



Mr. Pennant has given a very good figure of the ♦■(Xirh 

 111 the upper vai\e of this flieil, ana cr luc 

 M. truncaia. 



• Tor the fake of perfpicuity, in the defcription of the Hinge, I have called that the 

 Upper valve which cunuins the great tooth, 



margiritijcru,, 



