ah 
ad 
å 
6 G. QO. Sars. 
last Part but one of his work on the Norwegian Cyclopoida, it 
exhibits, beside the anterior lip or labrum, only 3 pairs of di- 
stinctly defined mouth — appendages, viz., the maxille with their 
palps, the anterior maxillipeds and the posterior maxillipeds, the 
mandibles being wholly absent. The said parts are densely crowded, 
forming together an obtuse protuberance, most easily observ- 
able in the lateral aspect of the animal (see fig. 2). Fig. 5 re- 
presents these parts in their natural position, as seen ventrally. 
The anterior lip or labrum (fig. 5 1, fø 60 
shaped and deeply cleft in the middle, being divided into two 
thin rounded lobes covering over the masticatory parts of the 
maxillæ. The edges of these lobes are perfectly smooth, without 
any traces of hairs or cilia. At the somewhat constricted base of 
the labrum, the. oral aperture, or more properly the “arehed 
chitinous stripes encircling it, may be plainly traced. Of a posterior 
lip no tracc can be detected. 
The maxille (fig. 5 m, fig. 7), forming the forémosmpain 
of true oral limbs, consist each of the chief part or stem and of 
a thin lamellar appendage, tbe palp, attached outside the base of 
the former. The stem itself (generally described in other poeci- 
lostomous Cyclopoids as the mandibles) forms a strongly chitinised 
piece placed transversally on each side of the labrum and pro- 
duced inside to a slender masticatory part covered over by the 
lateral lobes of the labrum. This part terminates in a somewhat 
lamellar falcate process curving forwards and exserted to a thin 
setiform extremity adjoining from behind the oral aperture. Its 
inward turned (outer) edge exhibits a thin very finely denticulated 
crest, which however does not extend to the tip (see fig. 7 a). 
The part which here is termed the palp (p), but which of most 
recent authors has been considered an independent oral limb 
(maxilla), clearly shows its immediate connection with the just 
described foremost oral limbs, of which it in reality forms only 
an appendage, evidently answering to the lobe or lamellæ almost 
invariably attached outside the maxillæ in other Copepoda. In 
the present Copepod it has the form of a thin pellucid lappet 
without any obvious musculature and extending obliquely back- 
wards. It is evenly rounded at the tip, and carries along the 
inner edge 4 small simple sete. 
The anterior maxillipeds (fig. 5. mp’, fig. 8), constitut- 
ing the middle pair of the true oral limbs, exhibit each a rather 
