BUFFALO SOCIETY OF NATURAL SCIENCES l6l 



In the same shale band about a half a mile distant the following 

 fossils were found, the eurypterids occurring in great abundance, but 

 the Ludlow fish Thelodus scoticus being represented by only two frag- 

 ments (215, 573): 



Myriopoda ? (impressions of) 

 Ceratiocaris sp. 

 Dictyocaris ramsayi Salter 

 Pterygotus bilobus Salter 

 Slimonia acuminata Salter 

 Thelodus scoticus Traq. 



In certain members of the Ceratiocaris group, though a little below 

 the fish horizon, there are recorded from Long Burn, a tributary of 

 Logan Water, the following species: 



Modiolopsis nilssoni (His.) 



Spirorbis sp. 



Beyrichia kloedeni (M'Coy) 



Beyrichia kloedeni var. torosa (Jones) 



Lingula minima (Sow.) 



Orthonota sp. 



Ceratiocaris 



Dictyocaris ramsayi (Salt.) 



Pterygotus bilobus (Salt.) 



Platyschisma (Trochus) helicites (Sow.) 



The best development of the Ludlow fish band occurs about \ mile 

 south of Logan House in which place also was found an excellently 

 preserved scorpion Palaeophonus caledonicus. *In the same place in 

 a cliff about 30 feet high a good section is exposed, showing hard 

 greywacke bands at the top, but below these are brown flaggy shales 

 containing Ceratiocaris in abundance and a few Pterygotus fragments. 

 Embedded in these shales are ironstone nodules which contain fish 

 remains. From this outcrop the following fossils have been collected 

 (215,574): 



Archidesmus loganensis Peach 

 Ceratiocaris longa Jones and Woodw. 

 Ceratiocaris murchisoni ? M'Coy 

 Ceratiocaris papilio Salter 

 Ceratiocaris stygius Salter 



