BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 11. N:o 13. 17 
Latera segmentorum pereii producta, laciniata, bases pedum te- 
gentia. 
Pedes pereii subequales, gressorii. Dactyli pedunculati, uni- 
ungaoiculati. 
Pedes uri pedunculo styliformi, ramis binis conicis. 
The body is broad, ovate, flattened. 
The head is pentagonal, anteriorly produced into a rostrum. 
Both pairs of antenne carry multi-articulate flagella. 
The lateral margins of the peretonal segments are pro- 
duced into strong, sharp lacinige or angulations, covering the 
bases of the legs. 
All the pereiopoda are subequal. The dactyli are ped- 
unculated, uni-unguiculate. 
The uropoda consist of styliform peduncles with two conic 
rami each. 
1. Acanthoniscus typhlops. G. O. SARS. 
Syn. 1878. Acanthoniscus typhlops. G.O. SARS. »Crustacea et Pycnogo- 
nida nova» etc. Archiv 
for Mathematik og Natur- 
videnskab. 4:de Bind, p- 
434. 
1885. > > > The Norwegian North At- 
lantiec Expedition. Zoo- 
logy. Crustacea, I. p. 119, 
pl: 10, fig: 27—30.: Christi- 
ania. Fol. 
The rostrum is bifurcated, the head carries on each side 
two laterally directed angulations. All the segments of the 
pereion carry each one median, spine-like tubercle on the 
dorsal side. The first segment shows one angulation on each 
side, the second, third, and fourth two, the fifth, sixth, and 
seventh three such angulations. The pleon has eight smaller, 
sharp angulations on each side. The uropoda are shorter 
than the pleon. The outer ramus is shorter than half the 
inner, the inner is shorter than half the peduncle. 
Colour. Wohitish. 
Length. 12 mm. 
Hab. North Sea, West off Lofoten, at 457 fathoms. 
2 
