Page:The Habitat of the Eurypterida.djvu/36

 correlation of the Siluric deposits of Bohemia and Scandinavia (Parallele entre les Depôts Siluriens de Bohême et de Scandinavie (11), that Pterygotus remains have been found at Klinta in Scania, southern Sweden, which recall Pterygotus problematicus of England (11, 58)

Upper Siluric or Ff1 of Barrande. Two species of Eurypterus have been recorded from the Upper Siluric of Bohemia in the same incomplete condition that those from the Lower were found in. E. pugio Barrande and a species related to P. bohemicus Barrande are the only representatives in this period. The latter is reported by Semper from a single claw and part of an abdomen found at Cerná rockle, Kosoř in a black limestone of Ff1 age.

. Coal Measures of Bohemia. In a rather blackish grey shale at Wilkischen, near Pilsen, Reuss found two macerated, but nearly complete individuals and a cephalon of a eurypterid which he named Eurypterus imhofi, and which is associated on the same slab with pinnules of Pecopteris. Reuss says that this fossil "of the Bohemian Coal Measures—a freshwater formation—is without doubt derived from a freshwater or brackish water ancestor (228, 83)."

. Upper Devonic. In only one locality in Belgium have eurypterids been found. Some thirty kilometers southwest of Liege at Pont de Bonne near Modave is exposed a section showing the Upper Devonic sandstones of Condroz. Lohest, Braconier and Destinez in working up this section found a few eurypterid fragments in 1888 and in the following year these were described by Julien Fraipont and Maximin Lohest. Eurypterus lohesti was described by Dewalque from two specimens, one the counterpart of the other, representing a complete cephalon. Fraipont described, ''Eurypterus ? dewalquei'' from a cephalon, a portion of an abdominal segment, and a few other fragments. One other fragment, a portion of one of the appendages, is thought by Fraipont to belong to a species related to E. ? dewalquei, but because of the similarity in ornamentation and agreement in size, he makes it only a variety, calling it ''E. ? dewalquei var. longimanus''.

The beds in which these remains were found are described by Lohest as follows (68, 55):

"We procured the major part of our fossils from the bed of green shales. They contain: Glyptolepis multistriatus, G. radians,