centrait; . . . Mis

5 Iclatliralu-annu/al. Rocm.

6 Icoclilealum . . Schlot.

7 lcrcbriseplum . Hall.

8 dimidialum . . Sow.

9 ibex .... Sow.

10 imbriealum . . Wahl.

11 linealinn . . . (lis.

12 WLudense . . . Sow.

JM

58 Contrées de la grande zone septentrionale d'Kurope.

Sr.

Norwége

Synon.

Faunes

siluriennes

A il 1 e ii r »

Î.S.g.Cioni oeerasHall.

anceps? .... Hall.