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ENTOMOSTRACA OF MINNESOTA. 3815 
GENUS ERPETOCYPRIS Brady and Norman. 1889. 
‘General characters of the animal closely approaching those of 
Cypris; but the sete of the third joint of the lower antenne are short, 
not nearly reaching the apex of the terminal claws, and are not 
plumose. The second pair of jaws have branchial plates as in Cypris. 
The power of swimming is lost, and the habits of the animals, which 
creep along the bottom, are thus very different from those of Cypris.”? 
(Brady and Norman). 
Erpetocypris minnesotensis (Herrick.) 
PLATE LXXII, Fias. 2-2h. 
1887.—Cypris minnesotensis C. L. Herrick (86), p. 28; Pl. IV, Fig. 2. 
Length 1.60 mm. 
This species is closely related to Erpetocypris fasciata (O. F. Miller). 
In F. fasciata the caudal margin of the abdominal ramus is smooth» 
but in HZ. minnesotensis it is pectinate. In /. fasciata the length is three 
times the width, but in F. minnesotensis the length is two and one-half 
times the width. 
The figures and the following description are from Professor Her- 
rick (86). 
‘‘From any of the American species it is at once known by the 
great proportionate length of the valves, which are about two and 
one-half times as long as broad. Lower margin nearly straight, gently 
sinuous near the middle, dorsal margin gently curved, highest back 
of the middle, then gently curved; color light, with two inconspicu- 
ous dark transverse bands on either side at about the anterior and 
posterior thirds; scattered hairs upon prominences are found near the 
margins. Antenne (antennules) slender, seven-jointed, apex with 
two very long and one short spine, penult segment with tour long 
setze, antepenult segment with two long plumose sete above, preceding 
segment with shorter setz; second antenn with the apical segment 
very short and armed with one (?) serrate claw and a seta, the preced- 
ing with two claws and a few short sete, antepenult segment with 
three (four?) shortish sete, not reaching end of claws; mandible with 
strong lobed teeth and a Jarge palp; first foot with a large claw; sec- 
ond foot slender, ending in a small hook with a single weak seta; cau- 
dal stylets rather short and wide, with two strongly serrated claws, 
the other spines being obsolescent (?); posterior margin serrulated. 
Lucid spots of the shell seven in number, two being minute. Length 
of shell 1.6 mm.’’ 
Habitat: Minnesota (Herrick, 86). 
