254: Panama /Shells. 



sis Eeeve. Having only 2 odd valves with an eroded surface, 

 we are unable to determine the species with confidence. 



Station. Attached to stones at low water ; Cuming ! Brode- 

 rip. Under stones ; Cuming ! Eeeve. 



Habitat. Eeal Llejos ; Cuming ! Broderip : also Eeeve. 



Central America ; Hanley. 



Eeal Llejos ; Jay. 



Panama ; C. B. A. ! 

 We found only 2 valves. 



407. Chania cchinata. 



Synonymy. 



Chama echinata Brod. in Proc. Zool. Soc. Lond. p. 150. Dec. 1834. 



Brod. in Trans. Zool. Soc. Lond. p. 305. pi. 39. 



f. 5-7. - 1835. 



Reeve Conch. Icon. pi. 7. f. 35. junior. Jan. 1847. 



/Station. At low water, attached to rocks ; Cuming ! Broderip : 

 also Eeeve. On rocks near low water mark. 



Habitat. Puerto Portrero ; Cuming ! Broderip : also Eeeve. 



Panama ; C. B. A. ! 

 15 specimens were obtained. 



Family AECIDJE. 

 408. Nuciila Elenensis. 



Synonymy. 



Nucula Elcnensis Sowb. in Proc. Zool. Soc. Lond. p. 198. Dec. 1832. 



- Mull. Syn. Test. Viv. p. 191. 1836. 



- Sowb. Conch. 111. No. 19. pi. 15. f. 14. 1841. 



Reeve Conch. Syst. pi. 85. f. 14. Sept. 1841. 



Hanley Descr. Catal. p. 1G9. 1845? 



With some hesitation we have referred our specimens to this 

 species, although we cannot detect the "marginibus crenulatis." 



