REPORT OP THE STATE PALEONTOLOGIST 1902 1081 



plied. The remains from earlier formations are extremely rare 

 and, almost without exception, very fragmentary. Euryp- 

 terus boylei Whiteaves (l) 1 was described from a single 

 nearly complete body found in the Guelph dolomites underlying 

 the Salina in Ontario ; Eurypterus prominens Hall 

 (2), from a cephalothorax referred on doubtful grounds to the 

 Clinton of Cayuga county, N. Y. ; fragments of Pterygotus were 

 described by Barrande (3) from the Siluric of Bohemia; the 

 genus Echinognathus Walcott (4) was described from a single 

 limb found in the Utica shale (Lower Siluric) of New York; 

 Eurypterina Walcott (5), from fragmentary remains found in 

 the Belt terrane (Precambric) of Montana; and recently, the 

 genus Strabops Beecher (6), from an essentially entire body 

 found in the Cambric of Missouri. 



Other forms of life occur with the eurypterids in this fauna, 

 but they are comparatively inconspicuous and have no effect 

 on the general fades. 



The entire fauna comprises: 

 Graptolitida 1 Ostracoda 1 



Annelida (denticles) 3 Phyllocarida 2 



Brachiopoda 1 Synxiphosura 1 



Pelecypoda 1 Eurypterida 6 



Cephalopoda 2 



Total 18 



Three species from the original collection made by the writer, 

 have already been described by Dr John M. Clarke (7), viz, two 

 phyllocarids representing the genera Ceratiocaris (C. prae- 

 cedens) and Emmelezoe (E. decora), and a merostome 

 belonging to the synxiphosuran genus Pseudoniscus (P. 

 roosevelti). Five new species of eurypterids and a 

 variety of one of these are here recognized, representing four 

 genera, one of these being new to science. The specimens re- 

 ferred to four of the species are so fragmentary that at present 

 they do not warrant complete determination, it being preferable 

 to wait till more perfect examples have been obtained. These 

 fragments, however, have been figured and will be referred 

 to briefly. 



See references on p. 1109. 



