250 Panama Shells. MYTILID^. 



these are identical witli the species which occurs abundantly in 

 some parts of the Bay of Panama, and from which pearls are 

 procured. 



S02. ATictila sterna. 



Synonymy. 



Avicula sterna Gould Proc. Bost. Soc. Nat. Hist. p. 93, Nov. 1851. 



Station. — Attached to a small species of Grorgona, at the low 

 water mark of the spring tides. 



Habitat. — Panama; E. Jewett! Gould MSS. 



Panama ; C. B. A. I 

 10 specimens were collected on the reef. 



393. Perna . Sp. indet. a. 



Station. — Under stones and in the crevices of rocks at low 

 water mark. 



Habitat.— L& Paz ; Lt. G reen I Gould MSS. 



Panama ; 0. B. A. I 

 130 specimens were collected on the reef. 



394. Perna . Sp. indet. b. 



"With the preceding : 30 specimens were collected. 



Family— MYTILID^. 

 S95. Pinna maura. 



Synonymy. 



Pinna maura Sowb. in Proo. Zool. Soc. Lond. p. 84. June 1836. 

 Hanloy Descr. Catal. p. 255. 1845? 



Station. — Muddy banks ; Cuming I Sowerby. 



Habitat. — Panama ; Cuming 1 Sowerby. 

 Panama ; Hanley 1 



