187 



sub-angular in the middle, inner edge straight and clothed with a row of 

 slender spinules; dactylus very long and provided at the base inside with a 

 slender spine. 



Colour of female whitish grey, with translucent pale yellow ovarial tubes. 



Length of adult female 2.45 mm.; of male 2.20 mm. 



Remarks. The above-described form is easily distinguished from any 

 of the other Lichomolgidce, both as to the general form of the body and to 

 the structure of the several appendages. The remarkable rostral lamella 

 attached beneath the frontal part of the head, between the insertions of the 

 anterior antennae, is more generally extended downwards, and accordingly is 

 most conspicuous in the lateral or ventral aspects of the animal. As it how- 

 ever is very mobile, it may in some cases be protracted, so as to be 

 visible also in the dorsal view of the animal, projecting in front with its 

 broadly truncated extremity, as shown by the figures here given. 



Occurrence. A considerable number of specimens of this peculiar 

 Copepod were picked up from the dredged material obtained by a single 

 catch made in the outer part of the Trondhjem Fjord, about midway between 

 Bejan and the opposite border of the Fjord, the depth ranging from 100 to 

 150 fathoms. The material conta'ned various deep-water animals, of which a 

 species of Antedon, A. Sarsi, was by far the most abundant. Though I am 

 much disposed to believe that tru present Copepod is a parasit of the said 

 Crinoid, I am unable to state this with full certainty, as none of the speci- 

 mens were found in immediate connexion with their supposed hosts. 



Gen. 45. Sabelliphilus, M. Sars, 1862. 



Generic Characters. Form of body rather different from that in the 

 other genera of the present family, being very narrow, with the anterior division 

 only slightly dilated. Cephalon faintly defined from the 1st trunkal segment, 

 and provided below the front with a strongly chitinised, immobile rostral plate 

 extending backwards and deeply bifurcate at the end. Tail composed of the 

 usual number of segments. Anterior antennas 7-articulate, with the first 2 joints 

 much larger than the others and lamellarly expanded. Posterior antennas 

 exceedingly powerful and armed at the end with very strong uncinated claws, 



