76 Canadian Record of Science. 
Paradoxides in such important points, particularly in the ab- 
sence of adorsal suture, as well as in having three prominent 
furrows on the glabella (in place of the two or four of Para- 
doxides), and especially in its peculiar hypostome, that it 
must be regarded as a genus intermediate between Paradox- 
ides and Olenellus.* 
Since Olenellus thus finds its nearest relative in the fauna 
of Series B., at the base of that series, are we, therefore, to 
regard the fauna of Series C, of which Olenellus is a part, 
as older than that of Series B.? If Mr. Murray’s strati- 
graphical work in Newfoundland is correct, this would 
appear to be the case. In any event there is the possibility 
that Olenelloid forms in some part of the world, were con- 
temporary with Paradoxidean forms in another part: but 
only the possibility, as the Paradoxidean stem may have 
thrown off genera resembling Olenellus in the earlier, as 
well as in the later stages of its existence. 
Having considered some points which favour the view 
that the Georgian Fauna is of greater antiquity than the 
Acadian, we may now take notice of those which have a 
contrary tendency. 
A prevalent and very striking genus of this series is 
Dorypyge of Dr. W. Dames.’ Of this genus, one species (the 
type) is known in China and four in America.’ In 
the latter region the species of this genus are found 
in the same layers with those which contain Olenel- 
lus,t and, therefore, are of equal antiquity. In China 
the latter genus has not been found with Dorypyge, 
which has with it only a Ptychoparian’ form, telling only 
that the enclosing strata are Cambrian. Dr. Dames com- 
pares Dorypyge to Peltura and Parabolina, as the most 
‘ It is to be hoped that his countrymen will see reason to connect 
Holm’s name with this new genus. 
> Included by Mr. Walcott in Olenoides, U.S. Geol. Surv. Bul. 
30, p. 221. 
* D. quadriceps, D. Wasachensis, D. Marcoui and D. Fordi. 
* U.S. Geol. Survey Bull. 30, pp. 26 and 32. 
° Liostracus megalurus, Dames. 
