243 



Male with the anterior antennae hinged in the usual manner, but having 

 the last joint of the proximal part only slightly dilated. Inner ramus of 3rd pair 

 of legs only differing from that in female in the seta of the outer edge being 

 transformed to a short spine. Last pair of .legs, as usual, much smaller than in 

 female, distal joint narrow fusiform; inner expansion of proximal joint very slight, 

 with a single seta. 



Colour whitish, pellucid. 



Length of adult female 0.64 mm. 



Remarks. In most of the structural details the present form closely agrees 

 with a species recently described by Th. Scott as L. longiremis. It is however 

 very conspicuously distinguished from that species by the much more produced 

 caudal rami. In L. longiremis, both according to the figures and the description 

 given by Scott, these rami are comparatively short, not exceeding in length the 

 last segment, whereas in the present species they are almost twice as long and 

 much more slender in form. Another character distinguising this species is the 

 total absence of any visual organ, a feature which has given rise to the specific 

 name here proposed. 



Occurrence. Some few specimens of this form were found in the summer 

 1906 at Flekkero, south coast of Norway, in a depth of about 20 fathoms. 



157. Laophonte longicaudata, Boeck. 



(PL CLXIV). 



Laophonte longicaudata, Boeck, Oversigt over de ved Norges Kyster iagttagne Copepoder. Chr. 



Vid. Selsk. Forhandl. 1864, p. 279. 



Syn : Laophonte Hodgei, Brady. 



Specific Characters. Female. Body rather slender, with the segments of 

 the anterior division less sharply marked off from each other than in the preceding 

 species. Cephalic segment large and contracted in front, rostral projection strongly 

 prominent and somewhat curved as the tip, which is minutely trilobate. Urosome 

 with the lateral expansions of the anterior segments rather slight and only spar- 

 ingly setous; last segment about the length of the preceding one. Caudal rami 

 very long and slender, equalling in length the last 2 segments combined, and 

 extending straight behind, apical setae comparatively short. Anterior antenna) 

 scarcely exceeding half the length of the cephalic segment, and distinctly 7-arti- 

 culate, 2nd joint the largest and exhibiting in the middle behind a short denti- 

 form projection. Posterior antennas of rather feeble structure, outer ramus well 

 developed. 1st pair of legs less robust than in most other species, outer ramus 



