turbinate shell

Those with turbinate shells may, indeed, after a certain fashion be said to resemble bivalves.

The turbinate shell is widely and profoundly perforated.

It has a rounded, conic to turbinate shell, with relatively thick walls and up to 5 whorls.

The delicate, turbinate shell is narrowly umbilicate.

The depressed, turbinate shell is very similar to Fossarina patula, but the spiral lirae are equal and simple.

The turbinate shell has collabral axial riblets and lacks a peripheral carina.

For there are those with turbinate shells, of which some have just been mentioned; and, besides these, there are bivalves and univalves.

A fourth complex consists of species with small, turbinate shells, strongly sculptured with the outer lip serrate or undulating.

Purpuras and Whelks, and all other Testacea that have turbinate shells, in structure resemble the Sea-snail.

The fifth complex consists of species with generally large, turbinate shells with minute sculpture often arranged in blocks; the outer lip is broadly expanded and the shells are usually darkly colored.