338 



Remarks. - This is the form originally recorded by Boeck as the type of 

 his genus Daniel ssenia. The Jonesiella spinulosa is unquestionably identical wi 

 Boeck's species. 



Occurrence. I have met with this form occasionally in several places on 

 the Norwegian coast up to the Lofoten Islands, and Th. Scott also records it from 

 East Finmark. It occurs in depths ranging from 12 to 30 fathoms, muddy bottom. 



Distribution. British Isles (Brady), Arctic Ocean off Novaja Semlja and 

 Franz Josef Land (Scott). 



th 



216. 





Danielssenia fusiformis (Brady). 



(PL CCXXIV). 

 Jonesiella fusiformis, Brady, Monogr. Brit. Copepoda, Vol. II, p. 39, PL XLVIII, figs. 1 13. 



Specific Characters. Female. Very like the preceding species, but of much 

 larger size and somewhat more slender form of body. Anterior antennae 

 distinctly 5-articulate, the terminal part being divided into 2 well-defined joints. 

 Posterior antennas scarcely differing in structure from those in the type species. 

 Posterior maxillipeds with the hand coarsely ciliated inside, one of the setse 

 issuing from the basal joint very strong and coarsely ciliated. Natatory legs 

 differing only very little in structure from those in the type species, though on 

 the whole more strongly built. Last pair of legs likewise of a very similar 

 shape and armature, inner expansion of proximal joint, however, comparative! 

 larger and more rounded at the extremity. 



Male with the anterior antennae comparatively more strongly built than 

 in D. typica. Inner ramus of 2nd pair of legs transformed in a manner very 

 similar to that in the type species, the rnucroniform process, however, being 

 comparatively shorter and stouter. 



Colour about as in the preceding species. 



Length of adult female 0.90 mm. 



Remarks The present form is very closely allied to the preceding species, 

 and it is rather difficult to derive from the structural details a sufficient number 

 of good distinctive characters; but the difference in size is so pronounced that this 

 alone must prove the present form to be specifically distinct, the more so as 

 both species in some cases are found living together in the very same plac 

 and under altogether similar conditions. ' 



Occurrence. I have found this form in considerable abundance in one 

 locality, at Skutesnses, in a depth of about 12 fathoms, muddy bottom. It also oc- 

 curs occasionally in other places on the west coast of Norway. 



Distribution. British Isles (Brady). 



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