PLATE CVL 



MACTRA STULTORUM. 



RAYED 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 lasvi obsolete radiata, 

 intus purpurascente, vulva gibba. Gmel. St/st* 

 Nat. T. I. p. 6. p. 3258. sp. 11. 

 Pectunculus triquetrus ex flavo radiatus. List, II, Conch, tab, 251. 



Jig. 85. 

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



fig- 42. 

 Trigonella tenuis admodum concava ferrugineo-cinerea radiata. Ra- 

 diata. Da Costa Br. Conch, p. 196. sp, 32.— 

 Tab. 12, Jig. 3. 3. 

 h 2 



