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G. 0. SARS — has unfortunately been lost. It seems to me rather probably that in describing
this species G. 0. Sars has not confused two forms, as G. W. MÜLLER seemed inclined to
believe at first — cf. G. W. MÜLLER, 1894, p. 218.
Key to the species described in this treatise (applies also to the males investigated by me) :
The end joint of the first antenna has seven bristles, two simple
sensorial filaments, d- and e-bristles. — 2.
1. The end joint of the first antenna has six bristles, only one
simple sensorial filament, the e-bristle, is developed,
the d-bristle verruciform. — 3.
The first endopodite joint of the mandible is furnished antero-
distally with powerful chitinous spines. A. spinifera.
The first endopodite joint of the mandible has no powerful
chitinous spines at all. A. quinqueselae.
The second endopodite joint of the mandible has a long,
narrow bristle, with short, fine hairs, between the
b-and c- main bristles. The sensory bristle of the fifth
joint on the female first antenna has only six sensorial
3. filaments. — 4.
The second endopodite joint of the mandible has no such bristle
between the b- and c- main bristles. The sensory
bristle of the fifth joint on the female first antenna
has seven sensorial filaments. — 8.
4.
5.
The sixth limb has no posterior ventral bristles. A. aberrata.
?» î, s, has ,, ,, ,, 5.
The (original) third joint of the first antenna has five bristles
on the anterior edge. A. curta.
The (original) third joint of the first antenna has six bristles
on the anterior edge. — 6.
The distal bristle of the endopodite of the second antenna is
about as long as or only slightly longer than the
endopodite. The second endopodite joint of the
mandible has comparativelv numerous cleaning
bristles, seven in a distinct lower row, from five to
eight in a distinct upper row. A. Ohlini.
The distal bristle of the endopodite of the second antenna is
twice or more than tvvice as long as the endopodite.
The second endopodite joint of the mandible
has comparativehr few cleaning bristles, five or six in
a distinct lower row, two or three in an upper row. — 7.
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