PLATE XX. 
I 
Fig. 2, 3. EXOLETA orbiculata. Fig. 19, 20. Young shell. ' 
ExoLETA orbiculata, Brown'n MSS. Lam. Sij.st. v. p. 
Venus exoleta, Monf. Test. Brit. p. 116. — Brown in Ency. Brit. vi. p. 413. ' 
Fig. 4. EXOLETA lincta. ; 
Exoleta lincta, Brown's MSS. i 
Venus lincta, Bull. Cat. Dor. p. 34. ' 
Venus exoleta, var.. Mat. and Rack, in Linn. Trans, viii. p. 87, pi. 3, f. 2. 
Cytherea lincta, Latn. Si/st. v. p. 573. 
Fig. 1. EXOLETA radula. 
Exoleta radula, Brown's MSS — A new species, found by James Gerard, Esq. in the Firth of Forth, and in his I 
cabinet. 
Fig. 6, 7. VENUS virginea. ; 
Venus virginea. Lam. Si/st. v. p. 600 — Mont. Test. Brit. p. 128 — Brown in Ency. Brit. vi. p. 414. 
Fig. 9. VENUS IRIS. 
Venus iris. Leach's MSS. j 
Donax iris, Mont. Test, Brit. p. 108 — Brown in Ency. Brit. vi. p. 411. 
i 
Fig. 5, 8. VENUS AUREA. i 
Venus aurea. Lam. Syst. v. p. 600. — Mont. Test. Brit. p. 129. j 
Fig. 15. CLAUSINA cassina. 
Clausina cassina. Brown's MSS. I 
Venus cassina. Lam. Syst. v. p. 587- — Mont. Test. Brit. p. 113. — Brotvn in Ency. Brit. vi. p. 411. i 
Fig. 16. CLAUSINA verrucosa. 
Clausina verrucosa. Brown's MSS. 
Venus verrucosa. Lam. Syst. v. p. 586.— Motit, Test. Brit. p. 112 — Brown in Ency. Brit. vi. p. 411. ] 
Fig. 10. CLAUSINA fasciata. ! 
Clausina fasciata, Brown's MSS. ' 
Venus fasciata. Mat. and Rack, in Lin. Tr. vii. p. 
Venus paphia, Mont. Test. Brit. p. 110. — Brown in Ency. Brit. vi. p. 411. 
Fig. 11. ORTYGIA gallina. 
Ortygia gallina, Leach's MSS. 
Venus gallina. Lam. Syst. v. p. 591 — Mont. Test. Brit. p. 113 — Brown in Ency. Brit. vi. p. 412. 
Fig. 12. ORTYGIA SULCATA. 
Ortygia Prideauxiana, Leach's MSS — Ortygia sulcata. Brown's MSS. — A new species, found in Devonshire by 
Charles Prideaux, Esq — In British Museum, and my Cabinet. 
Fig. 13. ORTYGIA cost at a. 
Ortygia costata. Brown's MSS — A new species, found by me at Seaton, Northumberland. — In Lady Jardine's 
Cabinet. 
Fig. 14. ORTYGIA rugosa. 
Ortygia rugosa. Leach's MSS. 
Venus rugosa, Penn. Brit. Zool. iv. p. 95, pi. 56, f. 50. — In my Cabinet. 
Fig. 15, 16. ORTYGIA spinifera. ■ 
Ortygia spinifera. Brown's MSS. < 
Venus spinifera, Mont. Test. Brit. p. 577:. p- 17;. f- 1- — Brown in Ency. Brit. p. 411. | 
Fig. 18, 19. LAS^A rubra. ! 
Las2EA rubra. Leach's MSS. I 
Cardium rubrum, Mont. Test. Brit, p. 83. — Wood's Gen. Conch, p. 212. | 
