Sethoconus = Sieve-cone; σήθω, κῶνος.

[190]

Periarachnium = Shell enveloped by cobweb; περί, ἀράχνιον.

[191]

Sethocephalus = Sieve-head; σήθω, κεφαλή.

[192]

Sethocyrtis = Sieve-basket; σήθω, κυρτίς.

[193]

Sethocorys = Sieve-helmet; σήθω, κόρυς.

[194]