I II

1659. Sait. Mi Siluria 1839. March.

Syst. W 1859. Sait. Quart.

Joorn. XV.

1839 Murrb.SU.

Syst.

1866. Mem Geol.

Surv. III.

1859. Murch. Sil.

Geol. Majj. V.

Brit. Pal Fo»s. App.

Quart. Joi

Sait Murch.

Siluria.

Geol Rep.

Londond.

Murch. Sil.

Syst.

Sait. Murch.

Siluria.

Murch. Si!.

Syst

Murch. Sil. Syst.

M'Coy Brit.

Pal Fr»*s.

Murch SU.

Syst

Sil. Foss.

Ircl.

Murch. SU.

Syst.

Murch. SU.

Syst.

Geol. Rep.