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Coi^uMBELLA DORSATA. Col. testd oblougo-pyramiduli, alba, lineis 

 irrecjularibuSyjlexuosis, confertis, cuslanels obtectd ; anfractibus 8, 

 IcEvibus, supenie turgidulis ; ultimi lateribus infiatis, dorso promi- 

 nente ; suturd distinctd ; uperturd angustd, flexiiosd, albd ; peri- 

 tremate extlis incrassato ; labio columellari exurato : long. 1, 

 lat. \poll. 

 Hah. ad oras (^olumbise. (Island of Muerte, Bay of Guayaquil.) 

 This species is somewhat like Col. gibberida, but it is much larger, 

 and the middle of the columellar lip is worn away ; there are also 

 other minor differences. — G. B, S. 



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