Sentence Examples with the word Terebratula

In certain forms, as in Terebratula and Terebratulina, it is short and simple, .and attached to a small divided hingeplate, the two riband-shaped lamina being bent upwards in the middle (fig.

Norman, Terebratulina caput-serpentis L., Terebratula (Gwynia) capsules Jeff., Magellania (Macandrevia) cranium Mull.,M.

The ventral valve is usually the larger, and in many genera, such as Terebratula and Rhynchonella, has a prominent beak or umbo, with a circular or otherwise shaped foramen at or near its extremity, partly bounded by one or two plates, termed a deltidium.