ENTOMOSTRACA OF MINNESOTA. 81 
I. Antenne shorter than the body. Stylets armed at the angle with 
a short non-ciliated seta. The female has no appendages at the 
genital orifice. The last segment of fifth foot on the right side 
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II. Antenne longer than the body. Stylets without the setz at the 
angle. Female with eight appendages at the genital orifice. 
Last joint of the male right fifth foot long and straight. . . appendicnlata 
Heterocope saliens Lilljeborg. 1862. 
PLATE X, Fia. 14. 
Last segment of the fifth feet of the female short and broad, teeth 
of its internal aspect distinctly bifid. The prolongation of the inner 
aspect of the antepenult joint of the left fifth foot of the male incurved, 
not reflexed at its end. 
Heterocope borealis Fischer. 1851 
PLATE X, Fia. 15. 
Last segment of the fifth foot of female long and straight, teeth less 
distinctly bifid or trifid. Prolongation of male left foot much curved 
and reflexed at the end. 
Heterocope appendiculata Sars. 1863. 
PLATE XI, Fia@. 3. 
Two other species, H. alpina and H. romana, have been described 
by Imhof (’88). These forms remain imperfectly known and may be 
simply young of other species. 
GENUS EPISCHURA Forbes. 1882. 
Related with Heterocope Sars. The thorax is six-jointed, the last 
two segments partly united. The abdomen is five-jointed in the male 
and four-jointed in the female. Antenne 25-jointed, the right male 
being geniculate. Abdomen of male with prehensile appendages, 
often more or less distorted. Inner rami of swimming feet one-jointed. 
Fifth feet one- branched, in the male modified for prehension. Caudal 
stylets with three long sete. The first mention of an animal of this 
genus seems to be Pickering’s description of Scopiphora vagans from 
deep water in Lake Ontario. It seems almost certain that the species 
so imperfectly described in Dekay’s Crustacea of New York, is none 
other than a species of Hpischura, but I hesitate to substitute for a name 
accompanied by good descriptions and figures, and one which has 
already been incorporated to some extent into our literature, one 
which is founded on a description so imperfect and general that one 
incidental character alone enables one to guess its application. The 
following is Pickering’s description: 
