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136 GEOL. AND NAT. HIST. SURVEY OF MINNESOTA. 
The swimming feet are all armed with very strong spines, aside 
from the usual quota of spines at the end of each joint. Length 0.65 
mm. 
GENUS ATTHEYELLA Brady. 
This genus, the diagnostic characters of which have been above 
indicated, contains three nominal species. It is quite difficult to say 
what differences exist between Sars’ Canthocamptus pygmeus and 
Attheyella spinosa. Brady did not-seem to recognize the fact that his 
diagnosis included that species. The third species is the blind A. 
cryptorum of Brady, which it is interesting to compare with the blind 
Bradya limicola of the coast of the Gulf of Mexico. 
GENUS MARSHIA Gen. nov. 
ze 
Allied with Attheyella. Inner branch of first foot three-jointed, 
scarcely elongated, barely subprehensile. Second and third feet with 
etter ramus two-jointed, short. Fourth foot with minute one-jointed 
outer ramus and three-jointed #*¢r ramus. Fifth feet one-jointed. 
Antenne six-jointed, the fourth joint with a slender hyaline process 
longer than the end of the antenna. Second antennz without obvious — 
palpus, prehensile. Mandiblar palp simple? First foot-jaw with an 
uniciliate papillose palpus. Second foot-jaw with a long uncinate 
Special joint. Antenne ofthe male-strongly modified. Habit, fresh 
or brackish waters. 
*Marshia albuquerquensis sp. n. 
PLATES XX XI; XXXII, Fies. 1-5. 
Body with ten obvious segments, with the aspect of Canthocamptus. 
Antenne short, six-jointed. The proximal joints enlarged and spinous; 
second also tumid, with three or more cilia; third joint longer; fourth 
with a long seta and still longer flagellum; fifth joint very short; 
apical joint elongate bearing about ten sete. Antennules short, pre- 
hensile, with four geniculate setee apically and several short spines, 
especially a transverse series of sharp teeth on the dorsal aspect. 
Jaws with six sharp teeth. Anterior maxillipeds with a minute uni- 
Setose palp and three processes bearing curved spines. Posterior 
Nore.—C. frontinalis Rehberg. This author seems to have parted with his usual acumen in the 
remarks upon this species. After describing a Canthocamptus with the inner ramus of the first foot 
“reichlich doppelt so lang wie die beiden Grundglieder des Aussenasts,” he draws a moral on the muta- 
bility of genera from the fact that Brady founded the genus A/‘heyella“auf grund der Eingliede des 
innenastes am fierten Fusspaare und einer derartigen Bildung des ersten Fusses, wie er bei C. frontinalis 
beschrieben ist.” Brady says (brit. Copepoda, p. 58): “Inner branch of first pair of feet scarcely at all 
elongated, and either two- or three-jointed,” ete. The distinctive characters being the one- or two- 
ointed second and third feet and the one-jointed inner ramus of the fourth foot, it is doubtful if C. 
rontinalis is really new. 
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