PLATE LXI. 



MACTRA SOLIDA. 



GIRDLED. 



GENERIC CHARACTER. 



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

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



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Thick, transversely striated and girdled. 



Mactra solid a : testa opaca lasviuscula subantiqua. Gmel. Linn. 



Syst. Nat. p. 3259. sp. 13. 

 -Concha crassa, ex altera parte compressa, ex altera subrotunda. 



List. II. Ah. Angl. p. 174. tit. 24. tab. 4. fig. 



24. — Pectunculus crassiusculus albidus. List. 



H. Conch, tab. 2.53. fig. 87. 

 Chama media fasciata crassa Petiv. Gaz,. tab. 94. fig. 7. 

 Chama minor plurimis fasciis. Id. ib. fig. 6. 

 A Pectunculus with azurine circular lines interpolated. Leigh. 



Lancashire, tab. 3. fig. 6. 

 Thick white striated Chama. IVallis Northum. p. 395. 



