*]2 NEW YORK STATE MUSEUM 



not in apposition as though connected with the articulation of the valves, 

 but standing apart with a well defined space between, indicating that they 

 are a broad chondrophore. Further material will be necessary to eluci- 

 date the nature of this shell. It is clear however, from the list given, 

 even though generic determinations only seem safe at present, that this 

 congeries represents a stage of late Siluric, clearly older than the fauna 

 of the Perce rock, probably older than beds of Cape Barre but not 

 necessarily older than the north flank of the Mt Joli massive. These 

 beds, the highest in the series, lie lowest in position as the entire mass 

 is slightly overturned. 



Beyond the light, seaward of the road, on the edges of the escarpment 

 in the field whence the purer layers of limestone have been removed for 

 burning, and which appertain to the southernmost and presumably 'lowest 

 part of the series here represented, after careful search fossils were found, 

 not in the blue and more abundant limestone, but in thin clinking limestone 

 plates. 



The mode of preservation here is singularly favorable though the 

 material is not abundant, the fossils being weathered out on the surfaces of 

 the plates and doubtless the fauna will prove an interesting and instructive 

 one under more favorable opportunities for exploration. These slabs have 

 afforded : 



Phacops primaevus 7iov. Zygospira recurvirostra Hall 



Calymmene senaria Conrad Orthis ? merope Billings 



Bumastus, small species Bolboporites americanus Billings? 



Asaphus or Ptychopyge Glyptocrinus ? 



Ceraurus pleurexanthemus Great Homocrinus ? 



Holopea cf. arctica Schuchert Climacograptus 



Camarospira bisulcata (^;;/;«(?//j') .? Hexactinellid spicules 



This association presents species of early Trenton age ; a quite 

 different congeries than that we have reported from the lower rocks of Mt 

 Joli but indicative of about the same geologic stage. Of special note here 

 is the trilobite, Phacops primaevus, which can not fail to interest 

 students of trilobite phylogeny. 



