392 G. £. Matthew—Paradoxides Kjerulfi. 
species ; but its companion-form in Europe has been found to 
be associated with P. dlandicus whose place is next above P. 
Kjerulfi. ; 
It is somewhat remarkable that P. Hteminicus, which is the 
American equivalent of P. rugulosus, should be one of the first 
species of Paradoxides to appear in the Acadian region, while 
in Scandinavia it is not known until after the appearance of P. 
Tessint, a species which is represented in Acadia at a higher 
level by P. Abenacus ; possibly its later appearance in Hurope 
is due to the higher measures presenting a more favorable hab- 
itat. In Acadia gray shales are followed by dark shales, but in 
Seandinavia the conditions were reversed, as the shales with 
black streak are the oldest. : 
The succession of the Paradoxides in the St. John Group, as 
far as it has been ascertained, is the following: 
| 
Division I. 
Wan ae | | upp AO aa 
|Band U eae ee Band d 
Paradoxides Kjerulfi* - ___- Pe sepa ees -- ==) SPSeKejenulie 
Paradoxides lamellatus --.| — t — — | P. délandieus. 
Paradoxides Kteminicus_-_-| — + + = — | P. rugulosus. 
Paradoxides Micmac ----~-- — ft ole eS | P. palpebrosus? 
Basa a | | PB. Sjogreni. 
Paradoxides Acadicus_-..-. — — + — |) P. Harknessi? 
Paradoxides Reginat -.--.| — — t — P. spinosus ? 
Paradoxides Abenacus ---_| — — — + P. Tessini. 
Of the six divisions of the Paradoxides beds of Sweden, 
given by M. Linnarsson, the three oldest have been recognized 
in the St. John Group; the presence or absence of the three 
higher remains to be determined. 
In regard to the form of the glabellain P. Ajerulfi there 
seems to be considerable diversity; in those from the green 
slate of Tomten in Norway figured by Linnarsson the front is 
wider than the base; but in those figured by Kjerulf the front 
lobe is as narrow or narrower than the rest of the glabella; one 
of Professor Kjerulf’s figures show P. Ajerulfi to be brachy- 
pleural when half grown.t 
St. John, N. B., Dec., 1886. 
* Fragments have been found which may belong to this species. 
+ A gigantic species intermediate between P. Bennettii and P. Harlant. 
¢ Om Skuringsmeerker, ete., I]. Sparagmitfjeldet (Christiania, 1873), p. 83, 
fig. 3. 
