T. globosa.
T. sanguinea.
T. caput-serpentis.
T. truncata.
T. psittacea.
T. dorsalis. The dorsal Terebratula. Pl. [17], fig. 1.
The summit of the large valve pierced with a round hole, very circumscribed; grooved longitudinally; valves as if cut sloping in the middle line.
T. globosa. The globose Terebratula.
Species smooth, with the valves rounded at their anterior edge.
T. caput serpentis. The Serpent’s-head Terebratula.