316 



Occurrence. I have as yet seen only 2 female specimens of this interesting 

 form, the one taken at Farsund, the other at Korshavn, both localities on the 

 south coast of Norway. It occurred in both places in a depth of about 20 

 fathoms, on a muddy bottom covered with decaying algae. 



Gen. 69. CeratOHOtUS, G. O. Sars, n. 



Generic Characters. Body armed with a double series of peculiar, highly 

 chitinized dorsal processes, lateral and sub-dorsal processes wanting. Rostrum 

 wholly absent. Anterior antennae slender, 4- articulate, 1st joint much the largest. 

 Posterior antennae and oral parts about as in the preceding genus. 1st pair of 

 legs differing conspicuously in structure from the 3 succeeding ones, both rami bi- 

 articulate and subequal in size. Inner ramus of the 4 succeeding pairs very small, 

 uniarticulate. Last pair of legs comparatively simple, biarticulate, resembling in 

 structure those in the genus Laophontodes. 



Remarks. This genus also is characterised by a most peculiar armature 

 of the body, and moreover differs from the 2 preceding ones in the total 

 absence of a rostrum, and also somewhat in the structure of the anterior antennae 

 and legs. 



206. Ceratonotus pectinatus, G. 0. Sars, n. sp. 



(PL CCXIII). 





Specific Characters. Female. Body very narrow and slightly attenuated 

 behind, with the segments somewhat less sharply defined than in the other species 

 of the present family. Cephalic segment nearly as long as the 3 succeeding seg- 

 ments combined, and abruptly constricted anteriorly, frontal margin without any 

 trace of a rostrum, being even slightly concave in the middle; antero-lateral 

 corners produced each to a strong, minutely spinulose process, turned somewhat 

 upwards; dorsal face armed behind the middle with a pair of very strong, horn- 

 like processes diverging somewhat to each side, and exhibiting along the anterior 

 edge a regular comb-like series of -about 8 spinules gradually diminishing in size 

 distally. Each of the 4 succeeding segments provided with a pair of similar 

 dorsal processes. Urosome much shorter than the anterior division, and of nearly 

 uniform width throughout, posterior part of genital segment armed with a pair 



