390 G. EF. Matthew—Paradoxides Kjerulfi. 
| 
Among Paradoxides the Acadian species is the largest 
known to the writer. With P. Harlani and P. Bennettit it 
constitutes a group of gigantic’forms with more or less folia- 
ceous, and curved rather than reflexed pleuree, which the 
writer believes will be found to characterize elsewhere, as it 
-does in Acadia, the Lower Paradoxides beds. From our pres- 
ent knowledge of these forms we indicate the two above named 
and P. Regina as independent species; but if connecting forms 
should be found, the Acadian and Newfoundland trilobites will 
stand as varieties of Paradoxides Harlani. 
Art. XLIT.— On the Kin of Paradoxides ( Olenellus 2) Kjerulfi ;* 
by G. F. Marruew. 
Tue following remarks are intended as a contribution to the 
discussion of the comparative age of the Paradoxides beds in 
Europe and America and the probable position of Olenellus in 
relation thereto. They are directed chiefly to the consideration 
of the allies of Paradowides Kyerulfi Linrs., as upon the deci- 
sion of this point partly depends the correlation of the Atlantic 
border Paradoxides beds with the Cambrian beds of the Hud- 
son River and the more western part of America. 
Mr. S. W. Ford, in an article “On the age of the Swedish 
Paradoxides Beds,” in which he ably reviews the evidence as to 
the zoological position of Paradoxides Kjerulfi,t quotes the suc- 
cession of the Swedish Paradoxides beds as given by Mr. 
Linnarsson in 1876, viz: 
(6.) Strata with Agnostus levigatus. 
°(5.) Strata with Paradoxides Forchhammeri. 
(4.) Strata with Faradoxides dlandicus. : 
(3.) Strata with Paradoxides Davidis. ‘ 
(2.) Strata with Paradowides Tessint. . * 
(1.) Strata with Paradoxides Kjerulfi. 
*In a communication published in this Journal. xxxi, 472, 1886, the writer 
stated that P. Kjerulfi occurred in Newfoundland, but on further examination of the 
material in which the trilobite so referred occurs, it seems doubtful if it is that 
species. The cheeks in the Newfoundland trilobite are free, whereas according to 
Dr. Brégger the cheeks of P. (0. ?) Kjerulfi are soldered to the middle piece of the 
head shield; and there is no free cheek as in the typical Paradoxides. The 
example supposed to have been found at Kennebecasis River is, for the same 
reason, not P. Kjerulfi. Dr. Brégger has stated that the pygidium is unknown 
and probably small; but until this part is recovered and found to be of the same 
kind as that of the American Olenelli, we cannot with confidence speak of it as 
belonging to the genus Olenellus; [ have therefore preferred to use in this article 
the generic name under which it was originally described. Dr. Brégger now 
gives Wahlenbergi as the*specific name of this trilobite, but on referring to the 
place where this name is used it appears as one of a list of species, but is not. 
accompanied by figure or description. 
+ This Journal, vol. xxxii, No. 192, Dec., 1886. 
