l3T5SSES2S5E?5!5=5a=5aS5a 



4' 

 TRKNTON FORMATION. 



PLANTiE? 



Biithotre[)hi8 gracilis, Hull. 

 PaIa3oi)hycu8 obscurus, Billings. 

 Licrophyciis minor,, Billings. 



" Ottawaensis, Billings. 



" succulens, Hall. 



Protozoa. 



A8tylos()ongia parvula, Billings. 

 Pasceolus globosus, Billings. 

 Receptacnlites lowensis, Billings. 

 " occidentalis, Salter. 



Polypi. 



Diplograptus amplexicaulis ? Hall. 

 Palseophylluni divaricans, Nicholson. 

 Petraia Ottawaensis, Billings. 

 Protarea vetusta, Ha!l. 

 Streptelasnia corniciilum, Hall. 



Crinoidea. 



Archseocrinns lacunosus, Billings. 

 " margiratns, Billings. 



" niicroba.salis, Billings. 



" pyriformis, Billings. 



Calceocrinus artioulosus, Billings sp. 



" insequalis, Billings sj>. 



Cleiocrinus magnificus, Billings. 



" regius, Billings. 



Dendrocrinns gregarius, Billings. 



" humilis, Billings. 



" proboscidiatus, Billings, 



" rusticus, Billings. 



" siinilis, Billings. 



Glyptocrinus decadactylus, Hall. 



" parvus, Hall. 



" quinquepartitus, Billings. 



** raniulosus, Billings. 



Heterocrinus Canadensis, Billings. 



" ' tenuis, Billings. 

 Hybocrinus conicus, Billings. 



" tumidus, Billings, 



locrinus subcmssus, Meek and Wortheu. 

 Lecanocrinus elegans, Billings. 

 " Isevis, Billings. 



