1898—1902. No. 18.] CRUSTACEA. 19 
81. Zaus spinatus, Goopstr. 
This form also occurred in 5 different bottles. The specimens 
agreed, perfectly, both in size and in their structural details with the 
form occurring off the Norwegian coast. 
82. Zaus Aurelii, Poppe. 
(Pl. Il, figs. 1—6). 
Zaus Aurelii, Poppe, Ueber die von Herrn Dr. Arruur and AureL Krause 
im nordlichen stillen Ocean und Behringsmeer gesammelten Copepoden. 
Arch. f. Naturgesch. 50. Jahrg. 1. Vol. p. 286, Pl. XX, figs. 7—9, Pl. XXI, 
figs. 5— 15. 
Specific Characters. — Female. Body somewhat less ex- 
panded than in the type species, the anterior division being oblong 
oval in form, with the cephalic segment evenly rounded in front. 
Rostral projection semicircular, deflexed. Urosome, as in the type 
species, much narrower than the anterior division, lateral expansions 
of the segments not much produced. Anterior anlenne comparatively 
shorter than in Z. spinatus, otherwise of a very similar structure. 
Posterior antennz and oral parts as in that species. ist pair of legs 
with the rami comparatively less robust, and the apical claws less 
thickly clothed with cilia. Natatory legs likewise somewhat more 
slender in shape. Last pair of legs with the distal joint oblong in 
form, more than twice as long as it is broad, and somewhat tapered 
at the end, inner expansion of proximal joint triangularly produced. 
Ovisac oblong oval in form, with only a limited number of. ova. 
Length of adult female 0.72 mm. 
Remarks. — This form is closely related to Z. spinatus Goopsir, 
but is of considerably larger size, and has the anterior division of the 
body somewhat less expanded. The several appendages are on the 
whole very similar to those in the type species, though on a closer 
comparison, some slight differences may be found to occur. The last 
pair of legs especially differ conspicuously in the narrower shape of 
the distal joint and the more produced inner expansion of the proxi- 
mal joint. 
Occurrence. — Some specimens of this form were found together 
with the preceding species in 3 of the bottles. 
Distribution. — The Pacific in lat. 55°56’ N, long. 154° 7’ W, 
on Laminaria and Macrocystis floating at the surface (Poppe); Novaja 
Semlja (Scort). 
