46 

 LUTRARIA CANALICULATA. 



Tab. X, /g. 1. 



SPECIFIC CHARACTER. 



Shell ovato-orbicular, inflated, thin and fragile ; 

 valves regularly and concentrically grooved, with 

 fine parallel lines within the grooves ; posterior side 

 shortj subcuneiform, compressed, with numerous 

 wrinkled lines ; epidermis yellowish brown, extremely 

 thin and deciduous ; within grooved as without. 



SYNONYMES. 



LuTRARiA CANALICULATA, Say, Joum. Jlcad. JYat. 

 Sciences, vol. 2, p. 311, Lister, t. SOS, Jig. 141. 



LuTRARiA cAMPECHENsis, Woocl, ludcx, Tcst. {Sup- 

 plement,) pi. 1, Jig. 



OBSERVATIONS. 



The figure quoted from Lister, Dillwyn says, '^ is 

 No. 66 of Schroeter's Einleitung ; and if more than 

 a variety, is nearly allied to Mactra plicataria.^^ Mr. 

 Say observes that it approaches the L. crassiplica of 

 Lamarck. 



Inhabits from Virginia to Florida inclusive, in abun- 

 dance j further north it is rarely seen, and I know 

 not whether it has been found north of Cape May. I 

 procured it in the Gulf of Mexico, near Mobile Point. 

 Lister's specimen was from the bay of Campeachy. 

 Professor Elisha Mitchell found it fossil in the Plio- 

 cene of North Carolina. 



