115 



CoLUMBELLA GiBBERULA. Col. testd ovnto-pyrumidaU ; spird 

 subnlatd ; anfractibus 8-9, pallidis, brunneo nubeculatis, ultimi 

 dorso superne gibbenilo, ad utrumque latus varicoso ; aperturd 

 breviuscuht ; peritrernate incrassato, expanso, intus denticulis 

 nonnullis ; labia interno superne calloso, medio arcuuto ; canali 

 brevi, reflexd : long. -,V, lat- -r^ poll. 



Hah. ad oias Americte Meridionalis et Centralis. 



Found in sandy mud at eleven fathoms depth, at the Bay of Ca- 

 raccas and Puerto Portrero. 



CoiiUMBELLA TURRiTA. Col. testd elongato-pyramidatd ; spird 

 subnlatd ; anfractibus 10, albidis, fusco reticulatis, et prope su- 

 turam articulatis ; aperturd ohlongd, superne acuminatd, subcana- 

 liferd ; labio externo incrassato ; peritremate alba, subreflexo, 

 intus IcEvi ; colmnelld arcuatd : long. l^v. let. -^tt poll. 

 Hab. ad oras Americse Centralis. (Bay of Montijo, and St. Elena,) 

 Found in coarse gravel and sandy mud at a depth of ten fathoms. 



CoLUMBELLA FULVA. Col. testd ovato-subulatd, fulvd, epidermide 

 minutissime reticulatd indutd ; anfractibus 10 ; superioribus lon- 

 gitudinaliter costatis ; ultimo infrd, spiraliter striata, superne 

 longitudinaliter costato ; aperturd, labio externo dentibusque in- 

 ternis albis : long. xV. ^«^- -2V poU- 



Hab. ad Panamam, sub lapidibus. 



CoLUMBELLA RUGOSA. Col. tcstd oblongd, medio gibbosuld ; epi- 

 dermide fused ; spiree apice plerhnque eroso ; anfractibus 7, lon- 

 gitudinaliter costato-rugosis ; ultimo infra spiraliter costato, su- 

 perne longitudinaliter costato, costis omnibus superne unituber- 

 culatis ; aperturd subapertd : long. ,V, Int. tV 7^0//. 

 Hah. ad oras Americae Meridionalis. (Panama et Xipixapi.) 

 Found vmder stones. 



In general appearance this and Col. Jluctuata resemble each other 

 nearly, but the aperture of Col. fluciuata is much narrower. When 

 the epidermis is removed, the shell is white, covered nearly all over 

 with black patches. 



CoLUMBELLA FLUCTUATA. Col. testd oblongd, albd, nigro vel cas- 

 taneo maculatd et fluctuatd ; epidermide fused ; spiree apice ple- 

 rumque eroso ; anfractibus 7, longitudinaliter costatis, ultimi cos- 

 tis abbreviatis ; aperturd medio coarctatd ; labio externo superne 

 emarginato, interno infra denticulato : long. -j%-, lat. ,V poll. 



Hah. sub lapidibus ad oras Americae Centralis. (Gulf of Nocoiyo.) 



CoLUMBELLA RECURVA. Col. tcstd oblougd, turritd, fulvd ; spird 

 acuminato-pyra7nidali ; anfractibus 10-11 j primis Q longitudi- 

 naliter costatis ; cceteris serie tubereulorum unicd instructis ; ul- 

 timi dorso suhgibbo, parte inferiore transversim striata ; aper- 

 turd elongates canali longixisculd, recurvd ; labio externo reflexo, 

 incrassato : long. l-yV, let. iV poll. 

 Hab. ad oras Americae Meridionalis. (Isle of Plata.) 

 Found among coral sand at a depth of seventeen fathoms. 



