Bittium watsoni var. dissimilis Sykes, 1925 accepted as
Bittium watsoni (Jeffreys, 1885) (original description)
Caecum achates Sykes, 1925 (original description)
Cerithiopsis concinna Sykes, 1925 accepted as
Narrimania concinna (Sykes, 1925) (original description)
Cerithiopsis papillaris Sykes, 1925 (original description)
Cithna excavata Sykes, 1925 accepted as
Xyloskenea naticiformis (Jeffreys, 1883) (original description)
Cithna marshalli Sykes, 1925 accepted as
Iphitus marshalli (Sykes, 1925) accepted as
Iphitus tenuisculptus (G. Seguenza, 1876) (original description)
Homalogyra aperta Sykes, 1925 accepted as
Eudaronia aperta (Sykes, 1925) (original description)
Homalogyra granulosa Sykes, 1925 accepted as
Retigyra granulosa (Sykes, 1925) (original description)
Homalogyra marshalli Sykes, 1925 accepted as
Neusas marshalli (Sykes, 1925) (original description)
Homalogyra sinuosa Sykes, 1925 accepted as
Adeuomphalus sinuosus (Sykes, 1925) (original description)