. East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida . •y llh. spire _llj. posterior canal (if present) Ilk. outer lip ^ 11m. mouth or apterture Fig. 11 Illustrating the technical terms applied to the various parts of a univalve shell The Spire. This embraces the en- tire univalve shell with the exception of the final whorl. Fig, llh. It may be DIS- COIDAL, resembling a disk, as in Skenea, elongated as in Terebra, or one of almost endless intermediate stages. Base of Shell. The opposite ex- tremi
. East coast marine shells; descriptions of shore mollusks together with many living below tide mark, from Maine to Texas inclusive, especially Florida . •y llh. spire _llj. posterior canal (if present) Ilk. outer lip ^ 11m. mouth or apterture Fig. 11 Illustrating the technical terms applied to the various parts of a univalve shell The Spire. This embraces the en- tire univalve shell with the exception of the final whorl. Fig, llh. It may be DIS- COIDAL, resembling a disk, as in Skenea, elongated as in Terebra, or one of almost endless intermediate stages. Base of Shell. The opposite ex- tremity to apex; also called anterior end of univalves or most recently built portion. Periphery is that portion of each whorl which is most outwardly developed and usually midway between suture and base. Fig. lip. It may be more or less rounded
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectmollusks
