A. 
124 
mud on 10 to 12 fathoms water; habitat: Crabisland ; 
St. Thomas; Krebs! Guadeloupe; Beau! remark: Jeon. 
de Conch. 
Areacea. 
Arca, L. 1758. 
Adamsi Shutil. station: in crevices of madrepores; 
habitat: Guadeloupe; Beau pg. 22! Virgin-Isl.; Swift! 
Tortola; St. Thomas; Porto-Plata; Krebs! 
. americana Gray. (A. pexata Say) station: —? —; 
habitat: Guadeloupe; Beau pg. 22! Florida; Cuba; 
d’Orbigny ! 
. antiqvata L. (Anodara Gray, A. Deshaysii Ph., A. 
hemidermos Ph.) station: small specimens fastened on 
madrepores and old specimens loose in blue sandy mud 
on 10 to 12 fathoms water; habitat: Cuba; Martini- 
que; dOrb.! Jamaica; Cuba; Carthagena; Ad.! Virgin- 
Islands; Swift! Krebs! 
. auriculata Lmk. station: — ? — ; habitat: St. 
Thomas; Cuba; d’Orb.! 
. barbadensis Petiver station: — ? — 3; habitat: 
Cuba; St. Lucy; Martinique; St. Thomas; d’Orb.! 
. brasiliana Lmk. (Scapharca Gray) station: — ?—j; 
habitat: St. Croix; Mérch pg. 41! Guadeloupe; Beau 
pg. 22! Rio Janeiro; Martinique; Guadeloupe; Cuba; 
d’Orbigny ! 
. candida Helbling. (Lithoarca Gray, A. ovata Gmelin., 
A. trapizina Lmk., A. Helbingii Brug.) station: fastened 
on the lower side af madrepores; habitat: Antillae; 
Morch pg. 40! Guadeloupe; Beau pg. 22! Florida; Mar- 
tinique; Cuba; @Orb.! Jamaica; St. Thomas; Ad.! Vir- 
gin-Isl.; Swift! Carthagena; Jamaica; St. Thomas; Tor- 
