— 676 —

Terebratula serrata Sow. — Lyme- Regis .

Trochus anglicus Sow. — Weslon.Unio (Cardinia) crassissima Sow.— Bail).

Unio (Cardinia) hybrida Sow. —Notlinghainshire.(Cardinia) Listeri Sow. —Durham.

MME. Système tle transition.

1) Calcaire magnésien.

Arca tumida Sow. — Sunderland.Axinus obscurus Sow. — Gadford-ClifT.

Pentamerus calvus Sow.— Noster-field.

Productus horridus Sow. — Der-hyshire.

Spirifer undulatus Sow. — Thick-ley.

2) Calcaire carbonifère.

Ammonites Henslotci Sow. — Ile de Man .

- Listeri Mari. — Halifax.

- (Gonialites) minutus Sow. —

- (Gonialites) striatus Sow. —

Derhyshire.

- (Gonialites) sphœricus Sow.

— Derhyshire.

Amplexus coralloides Sow. —Cork .

Ampullaria ( Euspira ) helicoidesSow. — Cork .

- (Euspira) nobilis Sow. —

Blackrocks.

Arca cancellata Sow. — Derby-shire.

Bellerophon apertus Sow. — Car-lingford.

- cornuarius Sow. — Ken-

dal.

- costatus Sow. — Derby -

- hiulcus Sow. — Derhyshire.

Bellerophon tenuifasciatus Sow. —Derhyshire.

Buccinum acutum ( Loxonema )Sow. — Irlande .

- imbricatum ( Loxonema )

Sow. — Bradley.

- spinosum (Murchisonia)Sow.

— Bradley.

Cardium (Conocardium) alœformeSow. — Ile de Man .

- ( Conocardium ) elongalum

Sow. — Derhyshire.

- ( Conocardium ) hibernicum

Sow. — Cork .

Cirrus acutus Sow. — Derby-shire.

- rotundatus Sow. — Seule.Conularia quadrisulcata Mill. —

Westmoreland.

- teres Sow. — Ecosse .Ellipsolithes (Nautilus) compressus

Sow. — Blackrocks.