83 



side and sending off inwards 2 short prominences. Anterior maxillipeds very 

 little prominent, and of a somewhat pyriform shape, converging anteriorly, and 

 each terminating in a knob-like point closely applied to the anterior extremity 

 of the metastomal plate. Posterior maxillipeds freely projecting and rather 

 fully developed, but very unlike in structure those in other Copepoda, being 

 doubly geniculate and composed of 4 joints, the 2nd of which is very large 

 and lamellarly expanded inside; last 2 joints much narrower and forming to- 

 gether a slender very mobile digit, which is allowed to impinge against the 

 inner sharpened edge of the preceding joint; proximal joint of this digit un- 

 armed, distal joint somewhat attenuated and armed at the tip with 2 very small 

 claws and, at some distance from the extremity, with another somewhat stronger 

 claw. Legs with a slight indication to a division in a basal and terminal part, 

 the latter exerted to an obtuse point without any traces of spines or setae; 

 1st pair somewhat larger than the other 2, which successively diminish in size. 

 Ovarial tubes in the specimen examined very conspicuous, extending through- 

 out the greater part of the trunk, 2 tubes present on each side connected 

 behind by a narrow commissure. Ovisacs broken off in the specimen exam- 

 ined, though indicated by a trifling piece of their coating still adhering to 

 each side of the genital segment. 



Colour of the living animal not yet ascertained. 



Length of the specimen examined about 3 mm. 



Male unknown. 



Remarks. The above-described form may be at once recognised from 

 any of the hitherto known Copepoda. Indeed, the curious similarity it exhibits 

 in the general outline of the body with a Praniza is very striking, and has 

 given rise to the specific name here proposed. On the parasitic nature of 

 this Copepod, no doubt can arise. 



Occurrence. A solitary specimen of this remarkable Copepod was found, 

 detached from its host, in a bottom-sample taken in the upper part of the 

 Christiania Fjord. In the same sample several other invertebrate animals were 

 contained, among them also some Annelids, and it seems to me not improb- 

 able, that the present Copepod had originally been attached to one of these 

 Annelids. 



