294 Panama Sheik. CORBULID^E. 



Florida ; Hanley. 

 Panama ; C. B. A. ! 



We collected 6 odd valves of this rare and elegant shell. L. 

 canaliculata Say is the Atlantic analogue. Dr. Gould has shown 

 us his L. undulata, which is quite distinct from either species. 

 Mr. Hanley must be in error as to the habitat of the species. 

 Its Atlantic analogue inhabits Florida, but is not likely to have 

 been confounded with this shell. 



496. ITIactra vclata. 



Synonymy. 



Mactra velata Phil in Zeitschr. Mai. p. 153. No. 10 for 1848. Mar. 1849. 

 Phil. Abbild. III. pi. 3. f. 5. Nov. 1850. 



This shell attains a length of 4 inches. A small variety (a) has 

 the posterior dorsal outline much less excurved. It may possi- 

 bly be a distinct species. Col. Jewett's specimens belong to this 

 type. 



Station. Unknown. 



Habitat. Panama ; E. B. Philippi ! Philippi. 



Panama; Troschel. 



Panama ; Col. Jewett ! Gould MSS. 



Panama ; C. B. A. ! 

 10 specimens were found on the reef. 



Family COKBULID^E. 

 497. Anatina alta. Nov. sp. 



Shell ovate, short ; anteriorly subangular and flexuous ; 

 otherwise with the margins well rounded : pearl-white, with a 

 thin brownish epidermis : with unequal striae of growth ; 

 surface microscopically sagrinate; beaks small, prominent, 

 approximate : umbones moderately convex : spoon-shaped tooth 

 followed by a well rounded deep sinus under the beak. 



