

PLATE LV. 



MYTILUS CYGNEUS. 



GREAT HORSE, OR SWAN MUSCLE. 



GENERIC CHARACTER. 



The hinge toothless, and consists of a longitudinal furrow. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Somewhat oval, one end rounded, the other extended, narrow, 

 and compressed ; thin and brittle. 



Mytilus Cygneus : testa ovata anterius compressiuscula fragilis- 

 sima, cardine laterali. Gmel. Linn. Syst. Nat. 

 p. 3355. 15. 



Mytilus Cygneus : concha testa oblonga ovata longitudinaliter 

 subrugosa, postice compresso-prominulo. Linn, 

 Fn. Suec. 1. p. 380. No, 133.2. 



Musculus latus maximus, testa admodum tenui, ex fusco viridescens, 

 palustris. List. A pp. LI. An. Angl. p. 8. tit. 30. 

 tab. 1. Jig. 3. and A pp. IL An. Angl. in 

 Goedart.p. 9. tit. 30. tab. I. fig- 3. — Musculus 

 latus maximus & tenuissimus e cceruleo virides- 

 cens, fere palustris. //. Conch, tab. 156. Jig. 11. 

 e 4 



