]matthew] CAMBRIAN FORMATION IN EASTERN CANADA 81 



fossils were in arenaceous beds not far above certain volcanic effusives 

 that physically hold the same relation to the Cambrian of this island 

 that the resembling rocks do to those of the St. John group in New- 

 Brunswick and were thought to be of equivalent age and so were 

 correlated with the Etcheminian. Since the writer's visit to Young's 

 Point, Prof. Percy Raymond has visited this spot, and found that the 

 fossil which the present writer, from imperfect material described as 

 a "paradoxidoid trilobite" is really of the genus Paradoxides, of which 

 Prof. Raymond found the middle piece of the head shield. He has 

 kindly loaned me this head for examination; it proves to be a mould 

 of the part mentioned and so does not show the outer surface. The 

 discovery of this trilobite head in connection with the observations 

 made on the material previously collected by the writer renders it 

 highly probable that the species represented by these fragments is a 

 species of Paradoxides of the Lower Paradoxides beds. If one could 

 be sure that the head had not been distorted it might be referred to the 

 species P. Mic-mac, Hartt of the P. Eteminicus subzone; in New 

 Brunswick, however, the latter species is of more common occur- 

 rence in beds having the texture of those in which this fauna is 

 entombed. 



The occurrence of a true Paradoxides in this bed at once raises 

 the fauna to a higher plane than the Etcheminian terrane, and renders 

 necessary a revision of the report on the Cambrian rocks of Cape 

 Breton in so far as relates to the assemblage of species in the sand- 

 stone at Young's Point. 



Since these fossils are to be referred to the Lower Paradoxides beds the following 

 changes should be made in the report referred to on the "Cambrian rocks of Cape 

 Breton." 



Page Line 



for " the upper division " read a part of 

 " " Etcheminian " read St. John terrane. 



" the base of the upper," read, of the St. John terrane 



" middle of Etcheminian," read lower part of St. John terrane. 

 26 for "Etcheminian" read, Paradoxides beds. 

 Transfer the lower half of page 18, page 19, and the first three paragraphs of 

 page 20 to the St. John terrane, Acadian division, at page 59. 



In the section of the report on Palaeontology at page 69 erase "Holocephalus," 

 "Paradoxidoid trilobites" "Hyolithes" and "Billingsella." 

 70, 28, for "Etcheminian or basal," read lower 

 " 30, after "to," insert, Clitambonites or, 

 " 31, for "basal," read lower 



79, transfer the two last paragraphs to page 180 (at end of second paragraph) 

 85, HYOLITHES, and to the end of the page, transfer to page 183 at line 18. 

 84, transfer first and third paragraphs to page 183 and omit second paragraph. 

 110, and table on page 111, transfer to page 189, at end of third paragraph. 



