On the Cambrian Faunas. 257 



were found : — Paradoxides, sp. ; Agraulos socialis, Bill. ; 

 Agnostus gibbus ? Linrs ; Hyolithes, sp. 



HORIZON OF PARADOXIDES TESSBNI. 



A different and probably somewhat higher horizon appears 

 to be indicated by species found at Chapel Arm, Trinity Bay. 

 Mr. Billings describes from this place : — Paradoxides tenel- 

 lus, Bill. ; P. decorus, Bill. ; Anopolinus venustits / Bill. ; Obo- 

 lella (Linnarssonia) misera, Bill. ; Solenopleura communis, 

 Bill. ; and Agraulos socialis, Bill. In the species from this 

 locality there are also the following: — Eocystites, sp..; Bey- 

 richona f sp. ; Agnostus lozvigatus, Dal. ; A. punctuosus, Ang. 

 var., Agnosti, other species and Microdiscus punctatus, Salt. 

 There are fragments of a Paradoxides, which by its hypos- 

 tome, suture, pleura? and pygidium is very like P. Tesseni of 

 Europe. This is, perhaps, the P. decorus of Billings. The 

 organisms from this locality are evidently a Menevian 

 assemblage, equivalent to Band d of Division I. of the St. 

 John Group. 



HORIZON OF PARADOXIDES SP1NOSDS. 



This species was quoted on account of the occurrence of 

 Paradoxides Beivnettii, Salt., at St. Mary's Bay. Discovered 

 many years ago, it was the first which drew attention to 

 the interesting Primordial Fauna of Newfoundland. The 

 resemblance to P. Harlani, Green, from Braintree, Mass., 

 has been pointed out by Mr. Walcott and others. Mr. Bil- 

 lings describes from the same locality Agraulos affinis. The 

 corresponding species in the Acadian region is found in 

 Division I., Band c (and d?). An Agraulos and a Ptycho- 

 paria have been described from the slates in which P. 

 Harlani occurs in Massachusetts. If we have regard to the 

 associated species, and also to the suture and eyelobe of 

 P. Bennett ii (=P. Harlani f), it seems probable that the 

 horizon of this species is below that of P. Forchammeri and 

 P. Davidis of the European Cambrian rocks. 



HORIZON OF PARADOXIDES DAVIDIS. 



In a black, calcareous rock from Highland's Cove, in 

 Trinity Bay, there are abundant remains of a large Para- 



