MODIOLA. Panama Shells. 251 



Panama ; C. B. A, 1 

 Only 1 specimen was found- 



396. Pinna tuberculosa. 



Synonymy. 



Pinna tuberculosa Sowb. in Proc. Zool. Soc. Lond. p. 84. June 1835. 

 ' Hanley Deso. Catal. p. 256. 1845 ? 



Station. — Muddy banks ; Cuming 1 Sowerby, 



We found it in crevices of rocks, near low water mark. 



Habitat. — Panama; Cuming I Sowerbj, 



Panama; Hanley. 



Panama ; C, B. A. I 

 4 specimens were found on tbe ree£ ' 



397. Mytilus . Sp. indet. a. 



Station. — Unknown. 



Habitat. — Panama; C. B. A.1 

 1 specimen was obtained. 



398. liithodomus . Sp. indet. a. 



Station. — ^In thick shells, between half tide and low water 

 mark. 



Habitat. — Panama ; C. B. A. I 



20 specimens were collected on the reef. 



399. Modiola semifusca? 



Synonymy. 



Modiola semi/usca (?) Lam. An. sans Vert. No. 11. 1820. 



Sowb. Gen. pi. — . f. 6. 1824. 



(?) Lam. An. sans Vert. VH. 22. No. 11.. 



(Desh. ed.) 1836. 



Mytilus Cfuiaensis Kiist. (an Lam.?) Conch. Cab. pi. 1. f. 1. 1840. 



