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American Seashells
with a septum. As additional growth takes place, the animal retreats gradually from the apical or rear portion and forms new, internal septa. The operculum is thin, circular, homy, and multispiral.
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Figure 37. American Caecums. Atlantic: a, Caecum floridanum Stimpson; b, C. cooperi S. Smith; c, C. carolinianum Dall; d, C. pulchellum Stimpson; e, C. nitidum Stimpson; f, C. nebulosum Rehder (type). Pacific: g, C. californicum Dall; h, C. dalli Bartsch (type); i, C. carpenteri Bartsch (type); j, C. occidentale Bartsch (type); k, C. heptagonum Cpr.; l, C. orcutti Dall (type); m, C. crebricinctum Cpr. All ×10.
Genus Caecum Fleming 1817
Subgenus Caecum s. str.
Caecum floridanum Stimpson
Florida Caecum
Figure 37a
Figure 37a
North Carolina to Southern Florida.
