1. Cuthona caerulea. Length 10mm. Dark green digestive gland. Form with extreme reduction of ceratal pigment bands to single orange subterminal band. Isle of Arran. From Alder and Hancock, as Eolis glottensis.
2. Cuthona caerulea. Length 10mm. Dark green digestive gland. Form with extreme reduction of ceratal pigment bands to single orange subterminal band. Isle of Arran. From Alder and Hancock, as Eolis glottensis.

Cuthona caerulea. Length 10mm. Dark green digestive gland. Form with extreme reduction of ceratal pigment bands to single orange subterminal band. Isle of Arran. From Alder and Hancock, as Eolis glottensis.