30 THE HABITAT OF THE EURYPTERIDA 



have added Pseudo-Galathea rotundata and Palaeocrangon elegans. 

 At Tweeden Burn, Liddesdale, have been found many membra dis- 

 jecta, unidentifiable. The fauna also includes some Xiphosurans: 

 Prestwichia alternata Peach from Lavuston Burn, upper Liddesdale, 

 Prestwichia rotundata Woodward from the River Esk locality and 

 Cyclus testudo Peach from Langholm. Many of these crustacean 

 forms are quite well preserved. Scorpions also occur at Langholm: 

 Eoscorpius glaber Peach, E. euglyptus Peach and E. inflatus Peach. 

 These forms though never perfect are very complete and show all 

 parts well. 



Carbonic or Carboniferous. In the Coal Measures of Great 

 Britain the final stragglers among the eurypterids are found, just as 

 they are in North America. Eurypterus (Arthropleura) mammatus 

 Salter includes fragments from Pendleton Colliery, near Manchester, 

 England, which are associated with many plant remains, a few of 

 which may be mentioned: 



Lepidodendron obovatum. 



Lepidodendron slernbergii. 



Lepidodendron elegans. 



Neuropteris loshii. 



Neuropteris heterophylla. 



Neuropteris gigantea. 



Cyclopteris flabellata. 



Sphenopteris obtusiloba. 



Sphenopteris latifolia. 

 and some others 



BOHEMIA 



Siluric. Lower Siluric Ee\, Ee^ of Barrande. From the Siluric 

 basin of Bohemia Barrande listed six species of Pterygotus, all of 

 which are represented by the merest fragments and are of rare occur- 

 rence. They are found in undoubted marine formations, for Eeiis 

 a black graptolite-bearing shale, while Ee2 contains numerous cephalo- 

 pods, gastropods, trilobites and corals (12, 39-44). The species of 

 Pterygotus are: bohemicus, comes, cyrtochela, kopaninensis, mediocris 

 and nobilis. Of the general preservation and faunal associates of 

 these eurypterids Barrande remarks: 



"Our basin, so privileged in respect to the frequency and the state 

 of preservation of the trilobites and the other Crustacea, appears, on 

 the contrary, very poor in the fossils representing the two types of 



