PLATE CLIII. 



SOLEN PELLUCIDUS. 



PELLUCID RAZOR SHELL, 

 GENERIC CHARACTER. 



Bivalve, with equal valves, oblong, open at both ends ; at the hinge 

 a subulated tooth turned back, often double ; not inserted in the op- 

 posite shell. Animal an ascidia. 



SPECIFIC CHARACTER 



AND 



SYNONYMS. 



Shell suboval, somewhat arcuated, fragile, pellucid : hinge with an 

 acute bidentated tooth on one side. 



Solen Pellucidus : testa subovali subarcuata fragile pellucida car- 

 dine altero acute bidentato. 

 Solen Pellucidus, Penn. Brit. Zool. T. 4. p. l. p. 84. sp. 23. 



A very rare species, and described only by Mr. Pennant, who 

 says it inhabits Red Wharf, Anglesea. 



