PACKARD. ] PHYLLOPODS, OF NORTH AMERICA. 313 
(G. W. Belfrage). Very common at Ellis, Kans., collected by Dr. L. 
Watson, and at Fort Wallace, collected by Prof. J. Lindahl. It is as- 
sociated with Streptocephalus texanus, Thamnocephalus brachyurus, Es- 
theria, compleximanus and mexicana. 
The shell compared with Baird’s figure of Limnadia antillarum, which 
belongs to this genus, and is closely allied to the present species; is 
more rounded oval at each end, the shell being somewhat truncated in 
the St. Domingo species. 
Species not recognizable. 
Limnadia coriacea Haldeman. Proc, Acad. Nat. Sc., Phil. I, 184, 1842. 
‘‘ Body lengthened; swimming branchie extending along three-fourths 
of the inferior surface, from the neck to the extremity of the tail; tail 
crested above with a row of large conical obtuse tubercles; apex of the 
shell elevated, and about one-fourth of the length from the anterior ex- 
tremity; color, light brown; length, 5 millim.; height, 3; diam., 14. 
‘¢ 7ab.— Ditches along the Susquehanna, in quiet water.” 
It is difficult to say whether this is a Limnadia or Estheria, as the de- 
scription is too brief and inexact to enable us to determine the genus or 
species. It cannot be a Limnadia, and seems to approximate more 
closely to Estheria; though it cannot belong to that genus, as the an- 
tenn are said to be 12-13 jointed. Until some one collects in the local- 
ities visited by Mr. Kite, we shall be in doubt as to what this form 
may be. 
Timnadella, novum genus. 
Charles Girard: On a new entomostracan of the family Limnadide, inhabiting the 
Western waters. Proceed. Academy Nat. Sciences of Philadelphia, vol. vii, 1854, 
1055, page 3. 
“Gen. character.—EHye, one. Antenne subequal, provided upon their 
inferior side with long and plumose sete, whilst on the upper side there 
are short, slender, and simple spines. Two elongated, tape-shaped 
jaws. Feet in twenty-four pairs, provided upon their extremities and 
sides with slender and plumose setz or hairs. A series of spiny pro- 
cesses along the posterior half of the dorsal line. Post-abdominal plate 
very large. Nutritive system phlebenteric. 
** Observations.—This genus differs from Limnadia in being provided 
with one eye only instead of two. Also by its antenne, the two pairs 
of which are similar in structure, whilst in Limnadia one pair is smaller 
than the other. The post-abdominal plate and number of feet will afford 
other distinguishing characters between Limnadella and Limnadia. 
From Cyzicus or Estheria it differs, first by the structure of the shell, 
which in Hstheria resembles that of an Arca, whilst in Limnadella it is 
altogether cyproid in its general aspect. There is a marked ditference 
between these two types in the structure of the antennee, the joints of 
which are provided on their upper part with numerous spines in Limna- 
della, whilst in Cyzicus there is but one single spine at the anterior edge. 
The structure of the feet is likewise dissimilar, being furnished with 
plumose setze in Limnadella.” 
Limnadella itei, n. spec. 
“ Spyecif. character.—Shell: elongated, subelliptical, thickest anteriorly ; 
twice as long as deep; anterior, inferior, and posterior margins regu- 
larly continuous; upper outline somewhat irregular on account of the 
