Page:The Habitat of the Eurypterida.djvu/97

 Plants:

Pachytheca, etc.

c. Old red sandstone of Lorne

Eurypterids:

Pterygotus cf. anglicus

Fishes:

Cephalaspis lornensis

Mesacanthus

Thelodus (?)

Ostracods:

Aparchites

Isochilina

Beyrichia

Chilognathous myriopods:

Kampecaris

Archidesmus

Plants:

cf. Psilophyton

d. Upper old red sandstone fauna of Ireland

Eurypterids:

Eurypterus hibernicus

E. scouleri?

Fluviatile pelecypod:

Amnigenia (Anodanta) jukesii

Fishes:

Coccosteus

Plants:

Archaeopteris

Bothrodendron

Calamites

Sphenopteris

Stigmaria

Ulodendron

In the preceding lists only those faunas have been given which are abundantly represented in species and individuals, and which may, therefore, be considered characteristic. Of all the faunas cited, that from the waterlimes of Oesel, while not containing the largest number of species, is yet the one which is preëminently representative. The eurypterids undoubtedly lived and died in the muds now forming the waterlimes, the remains which are found there having suffered practically no transportation, as we may judge from the perfection of preservation and the entirety of individuals. The specimens of Eurypterus fischeri occur in greater numbers and in a more perfect state than do those of any other known species, and the exoskeletons are not only not compressed, but they even show the