Genus Thetis C. B. Adams, 1845+[1846] [not G. B. Sowerby, 1826]

(3-4-4-0-26-7-2-21-0-0-0-0-0)
[=Gouldia C. B. Adams, 1847]
Ref. Abbott, 1974 p 530
Vaught, 1989 p 135
Vokes, 1980 p 168