PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 23 

 Table II. — Meafntrcmcnts—Cout'iunt'd. 



IVOTK OIV .SIIEI.Ii.«4 FROTI COi^TA KIl'A KlTCBIEiVMIDOEiV, C'Ot,- 



liECTED BY nwts. FfiixT \yo bra:v.sford. 



By ^V. II. DALL. 



In their arcluiiological exploratious iu Costa Eica, while examiuing 

 the shell-mounds of Culebra near the western coast, a number of shells 

 were obtained from the mounds to exhibit the species of Which the 

 shell-heaps were composed. They are, of course, iu a semi-fossil condi- 



