679 —

U ) Silurien .

Euomphalus angulosus Sow. —Calcaire de Wenlock ,Colebrock-Dalc.

- discors Sow. — Calcaire de

Wenloch , Colebrock-l)ale.

- funalus Sow. — Aymestry.

- rugosus Sow. — Calcaire de

Wenlock, Colebrock-Dale.

Orthoceras annulatum Sow. — Cal-caire de Wenlock, Cole-brock-Dalc.

Orthoceras circulare Sow. — Cal-caire de Wenlock, Dud-ley.

Pentamerus Aylesfordii Sow. —Aymestry.

- Knightii Sow. — Aymes-

try-

- teris Sow. — Silurien infé-

rieur.

Spirifer octoplicalus Sow. — Cal-caire de Wenlock, Der-byshire.

Gisement inconnu.

Ammonites acutus Sow.

Helicina compressa Sow. — Leicestershire .