PACKARD.] PHYLLOPODS OF NORTH AMERICA. 337 
inward near the base of each branch or fork. The caudal stylets are a 
little longer than in the Greenland exainples, but this is probably due 
to the more mature development of the specimens. 
Length of male, 19"; length of claspers, 5""; length of 2d joint, 2™". 
Length of cercopoda or caudal appendages, 1.5"". 
Length of female, 18™"; length of ovisac, 5™. 
Although predisposed to think that Professor Verrill* had found good 
reasons for separating the Labrador from the Greenland individua!s under 
a distinct specific name, though I originally had examples of the Green- 
land B. paludosus from Dr. Liitken, of the Copenhagen Museum, for 
comparison, I have carefully re-examined them for any specific charac- 
ters that I might have overlooked. I see no differences in the append- 
ages, the 5th and 6th endites especially not differing in any essential 
point, as will be seen by the numerous figures on Plates IX and X, 
the apparent discrepancies in the drawings being due to different 
stages of preservation. There is a slight ditterence in the tips of the 
male claspers, which are a little blunter in the Labrador than in the 
Greenland examples, but this may be on account of the smaller size and 
less degree of maturity of the Greenland examples. I have not at hand 
the larger Greenland examples originally received from Greenland 
through Mr. Liitken. The Labrador examples were taken August 7, 
1864, in a small pool of water in a depression in the rocks on a point of 
land projecting into the water at “Indian Tickle,” on the north side of 
Hamilton or Invuctoke Inlet, Northern Greenland ; and others were seen 
at Tub Island, on the south side of the entrance of the bay, August 10. 
We add the following account by Baird of what seems to be without 
much doubt B. paludosus, and which shows that it inhabits Arctic 
America in latitude 68° 15’ N., longitude 113° 50’, of Greenwich: 
‘“‘Some fragments of a species of Branchipoda were brought by Sir 
John Richardson from Cape Krusenstern, in North America, collected 
there by Mr. John Rae in August, 1849, along with the Apus glacialis. 
They consist of portions of two males and two females. The male an- 
tenn are two-jointed ; the basal joint is thick, and has at its lower part, 
near its junction with the second, a row of small teeth; the second joint 
is cylindrical and pointed. The female horns or antenne are flat, ap- 
parently, and have a short hooked spine at the extremity. The caudal 
fins are rather long, and fringed with long cilia. In some respects this 
species resembles the figure of the Cancer paludosus of Miiller, but the 
fragments are too much decayed in the spirits to enable me further to 
describe it. It does not appear to have either antenniform appendages 
or any apparatus attached to the antenne of the male. 
Should these three species prove to be distinct they may form an- 
other genus of this family, characterized by the want of these append- 
ages and the toothed or serrated basal joint of the male cephalic horns.” 
Under the name of Branchipus (Branchinecta) arcticus, Mr. E. J. Miers 
notices this species in the Annals and Mag. Nat. Hist., ser. 4, vol. xx, 
p. 105, Pl. IV, fig. 1. His figure is a very indifferent one, and he erro- — 
neously represents the ovisac as double. Discovery Bay is in latitude 81° 
41’ N., longitude 64° 45’ W. Wereproduce his description and remarks: 
**Coll. Hart: Discovery Bay, in a small fresh-water lake and in a stream 
under ice. Several specimens were collected, including males and 
females, of a species of Phyllopoda, which I refer to the B. arcticus of 
Verrill. Of these species I have only seen the descriptions in the jour- 
nals above quoted, not having been able to meet with Verrill’s full re- 
* Prof. Verrill writes me that he has since (Amer. Jour. Se.) decided that his B. 
groenlandica is identical with B. paludosa, 
22 H 
