433 



1st pair of legs very small, 2nd basal joint, as in the succeeding pairs, nar- 

 rowly produced, and carrying at the end outside a slender seta, outer ramus 

 represented by a narrow, somewhat curved joint appearing as the immediate con- 

 tinuation of the basal part, and provided with 6 unequal setse, 3 on the outer 

 edge and 3 on the tip; inner ramus scarcely more than half as long as the outer, 

 and carrying on the tip 3 unequal setae. The 3 succeeding pairs of legs with 

 the 2nd basal joint much produced, outer ramus long and very narrow, with the 

 spines of the outer edge rather slender, the first 2 joints in the 2nd and 4th 

 pairs confluent, in the 3rd pair well defined; inner ramus in 2nd pair resembling 

 that of 1st pair, in the 3rd pair much smaller, bisetose, in 4th pair quite rudimen- 

 tary. Last pair of legs with the distal joint linear in form, and carrying 5 

 slender curved setse, proximal joint with the outer process very long and narrow, 

 inner expansion small, with 2 slender setse of unequal length. 



Male somewhat smaller than female, and having the anterior antennae 

 slightly hinged and composed of 7 well-defined joints, the 1st of which is much 

 the largest. Last pair of legs smaller than in female, with only a single seta 

 inside the proximal .joint. 



Colour whitish grey. 

 Length of adult female 0.84 mm. 



Remarks. This form is very markedly distinguished from the other 

 members of the family Anchorabolidce by its less slender body and the absolute 

 absence of any processes similar to those found in the other species. In most 

 cases, however, the body is found to be so thickly covered with muddy particles, 

 that these differences only become obvious after the animal has been subjected 

 to a very careful cleansing. The muddy particles are apparently kept in place 

 by the peculiar stiff hairs which clothe the surface of the segments, and evidently 

 serve as a protecting covering for the body, the integuments of which are very 

 thin and fragile. It is to this peculiarity that the specific name here proposed 

 refers. 



Occurrence I found this peculiar Copepod last summer not unfrequently 

 at Korshavn in a depth of 30 50 fathoms, on a bottom covered with coarse 

 sand intermingled with mud. It moves in a manner very similar to that observed 

 in Anchorabolus mirabilis, for which it may easily be mistaken, as that form is 

 also very often found covered by a thick crust of muddy particles. 



Page 325. 

 Add the following species; 



