Hinges of Brliifi Bivahe Shells. ' 1 6 1 



Tab. XV. Fig. 1—4. 



One valve of the T. planata contains three teeth ; tsvo 

 near the beak, and one rather remote. 



The other valve has only two, and the largeft is 

 divided longitudinally. 



incarnata. Linn. Syjl. Nat. ed. Gmel. i. p. 3234. Penn. Br. Zool. 

 No, 52. /. 49. J] 32. 32. Li/l. Conch, t. 405. f. 250. 

 — ^n. Ang. t. \. f. 25. Tia Cojl. Br. Conch, p. 211. 

 /. 12. / 4. 4. 4. Gault. Tejl. i. 88. /. M. 



Tab. XV. Fig. 5—8. 

 This Ihell has two teeth clofe to the beak in each valve, 



one of which is fulcated. There are no remote 



teeth. 

 Mr. Pennant has called this fhell carnaria. I believe 



his "f. incarnata to be the 7. radiata of Linnasus. 



■cornea. Linn. Sjji. Nat. ed. Gmel. i. p. 3242. F emu Br. Zool. 



No. 36. /. 49./ 36. Da CoJl. Br. Conch, p. 173. 



*' 1 3- fig- 2. 2. Lijl. Conch. /. 159. / 14. — An. Ang. 



t. 2./. 31. App. 12. t. 1. f. 5. Gault. Teji. t. 7. 



f. B. C. ClMmn. Conch. 6. t. 12,. f. i^t,. a. 0. 



Tab. XV. Fig. 9—12. 

 In the T! cornea we find four teeth in each valve. Tlie 

 two remotely fituated arc of a confidcrab'e fize ; but 

 thofe placed more immediately under the beak are 

 fo minute, that they are hardly to be diftinguilhed 

 without a magnifying glafs, even in the large Thames 

 fpecimens. 



Vol. VL Y If 



