BUFFALO SOCIETY OF NATURAL SCIENCES 89 



Ceratiocarids. 



Ceratiocaris laxa 



Ceratiocaris longa 



Ceratiocaris papilio 



Ceratiocaris stygius 



Ceratiocaris cf. murchisoni 

 Worm tracks. 



(2) In same bed § mile distant: 

 Eurypterids: 



Pterygotus bilobus 



Slimonia acuminata 

 Ceratiocarids: 



Ceratiocaris sp. 



Dictyocaris ramsayi 

 Coelolepid fish: Theiodus scoticus 

 Myriopods ? impressions of 



(3) From Long Burn, tributary of Logan Water in same bed 

 Eurypterid: Pterygotus bilobus 



Ceratiocarid: 



Dictyocaris ramsayi (Taxonomic position doubtful) 



Ceratiocaris sp. 

 Ostracods: Beyrichia kloedeni 



Beyrichia kloedeni var. torosa 

 Pelecypods: Modiolopsis nilssoni 



Orthonota sp. 

 Brachiopod: Lingula minima 

 Gastropod: Platyschisma (Trochus) helicites 

 Worm tubes: Spirorbis sp. 



(4) One half south of Logan House in "fish-band" 

 Eurypterid: Slimonia acuminata 

 Ceratiocarids: Ceratiocaris longa 



C. murchisoni 



C. papilio 



C. stygius 



Physocaris sp. 

 Coelolepid fish: Theiodus scoticus 



T. planus. 



Fish fragment undet 

 Myriopods: Archidesmus loganensis 



(5) At Logan Water in Pterygotus beds overlying Ceratiocaris beds. 

 Eurypterids: Eurypterus lanceolatus 



E. obesus 

 E. scorpioides 

 Pterygotus bilobus 

 P. bilobus var. acidens 

 P. bilobus var. inornatus 

 P. raniceps 

 Slimonia acuminata 

 Stylonurus logani 



