452 Smith and Verrill—Dredgings in Lake Superior. 
Procotyla fluviatilis Leidy. Numerous specimens, apparent 
of this species, were obtained in 8-138 fathoms on the sout 
side of St. Ignace. They were, when living, dirty white, mottled 
with brown. 
In addition to the preceding species of worms, a few were 
obtained which have not yet been fully determined. 
CRUSTACEA. 
Mysis relicta Lovén. The occurrence of this and the follow- 
ing species, identical with forms from Lake Michigan, and the 
lakes of northern Europe, is mentioned in the last number of 
this Journal. It was brought up with sand and mud from 12 
to 14 fathoms at the eastern end of St. Ignace, from 8 to 13 
fathoms, with Cladophora, on the south side of the same 
island, and from deep water in a large proportion of the hauls 
from 73 to 148 fathoms. 
Pontoporeia affinis Lindstrém. This species was found at 
the peduncle of the antennule. jpoda sub-equai 12 
both sexes, the second pair being only slightly larger than the 
first ; propodus in the first pai rate, the palmar, : 
and armed with several spines. 
_ The incubatory lamelle of the female are very large, Pd 
jecting meh percns the coxse of the anterior legs, as In © me 
of the antennule, antenne thepoda, while it differs 
nt . etc., 
_ much in the ultimate pleopoda and in the form of the telson. 
Length, 5 to7™ : 
