PLATE CVI. 



IVIACTRA STULTORUM. 



RATED MACTRA. 



GENERIC CHARACTER. 



Animal a Tethys. Bivalve, sides unequal. Middle tooth com- 

 plicated, with a little groove on each side ; lateral teeth remote. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell semi-transparent, smooth, with faint radiations ; within pur- 

 plish. 



Mactra Stultorum: testa subdiaphana Isvi obsolete radiata, 

 intus purpurascente, vulva gibba. Gmcl. Si/st. 

 Nat. T. I. p. 6. p. 325S. sp. 11. 

 Pectunculus triquetrus ex flavo radiatus. LisL 11. Conch, tab. 2.51. 



fig' ^-5. 

 Mactra stultorum, Simpleton. Penn. Br. Zool. No. 42. tab. 52. 



.fig- -^2. 

 Trigonella tenuis admodum concava ferrugineo-cinerea radiata. Ra- 

 diata. Da Costa Br. Conch, p. 190. sp. 32. — 

 Tab. \2.fg. 3. 3. 

 H 2 



