32 THE HABITAT OF THE EURYPTERIDA 



correlation of the Siluric deposits of Bohemia and Scandinavia {Par al- 

 lele entre les Depots Siluriens de Boheme 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 Ffi of Barrande. Two species of Eurypterus have 

 been recorded from the Upper Siluric of Bohemia in the same incom- 

 plete 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 Cerna rockle, 

 Kosof in a black limestone of Ffi age. 



Carbonic. 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)." 



BELGIUM 



Devonic. 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, Holop- 



