“TURQUETIA INTEGRA, sp. nov.
(Plate lxvi., fig. 7, 8, 9, 10).
Shell small, moderately solid, rather inflated, nearly equilateral, oblong, higher behind than before, dorsal margin straight, anterior and posterior rounded, ventral slightly sinuated. Colour cream. Umbo inflated, prominent. A slight shallow median sulcus externally. Sculpture: fine irregular incremental lines. Hinge, a narrow external ligament, no laterals, a tubercular subumbonal cardinal and socket in each valve. Pallial line entire. Height, 3.5, length, 6; depth of single valve 1.5 mm.
A few separate valves were taken in 800 fathoms. My figure and description is based on a better example dredged in 250 fathoms, twenty-three miles east of Sydney by Mr. Petterd and myself.
The generic allocation of this species has been a matter of difficulty to me, and I have taken refuge, though not with feelings of security, in Turquetia. This at least corresponds to the extent of having a simple pallial line, no laterals and one cardinal in each valve. Our species is larger and has not the short truncate posterior side of the type. Turquetia was proposed by Velain22 for a small bivalve from St. Paul Island in the Indian Ocean. Its hinge was more fully explained by Bernard23.
22 Velain-Archiv. Zool. Exper., vi., 1877, p. 134, pl. v., f. 15-17.
23 Bernard-Bull. Mus. Hist. Nat., iv., 1898, p. 84, f. 5.”
(Hedley, 1907: 364)
