Lakes with Two Outlets, in 3Iinnesota. — Grant. 407 
material is defective, it contains abundance of Ptychoparia, 
Solenopleura and Anomocare. Agnostus hrevifrons is com- 
mon, and Agnostus parvifrons occurs. Borypyge is present, 
also Dolichometojnis. It is in fact the fauna of the Andrarum 
limestone or Upper Paradoxides beds of Sweden. 
One Dorypyge is very like Dicellocephalus (?) marcoui 
WhitheM^Ofenoifles marcoui of Walcott, and there is also a 
form near Pi'ott/pus senectus of the same author. These are 
strong points favoring the view that the Olenellus fauna of 
Vermont is of the age of the Upper Paradoxides beds of Swe- 
den. And in this connection I may add that though Cono- 
coryphea are specially characteristic of the Lower Paradox- 
ides beds, they are also found in the Upper, and that a form 
which in its sharpl}^ cut glabellar furrows and in other re- 
spects resembles Atops trilineatus, is found in the P. davidis 
fauna in Newfoundland. This fauna, so far as America is 
concerned, is in the Upper Paradoxides beds. 
It is somewhat significant that the European faunas, known 
to be older than Paradoxides are ^oor in genera of trilobites; 
the Russian has one genus, the Swedish three, the English 
two; and although that of Newfoundland seems to have more, 
this may be susceptible of explanation. In general terms it 
maybe said that the fauna of Olenellus is too rich in varied 
types of trilobites and in articulate brachiopods to be pre- 
paradoxidean. 
St. John. X. B., 6th April, 1897. 
LAKES WITH TWO OUTLETS, IN NORTHEASTERN 
MINNESOTA.* 
By U. S. Grant, Minneapolis, Minn. 
A i)aper by T. L. Watson on "Lakes with more than one 
outlet"! has suggested to the writer that a mention of other 
lakes of this character might be of interest. Several such 
lakes are known in the northeastern triangular area of Min- 
nesota included in Cook, Lake, and St. Louis counties, and it 
is not improbable that others will be noted when that part of 
♦Read before the Minnesota Academy of Natural Sciences. Mav 4 
1897. ' ' 
fAMER. Geol., vol. XIX, pp. 267-270, April, 1897. 
