10 



2. Longipedia coronata, Glaus. 



(PI. Ill & IV). 

 Longipedia coronata, Claus, Die freilebenden Copepoden, p. Ill, PL XIV, figs 1424. 



Specific Characters. Female. Body moderately slender, with the anterior 

 division, seen dorsally, of nearly uniform width throughout, the posterior one 

 gradually attenuated. Caudal segments with the posterior edge perfectly smooth, 

 without the slightest trace of denticles. Anal opercle with 2 subequal denticles 

 on each side, terminal spine rather elongate. Caudal rami a little longer than 

 they are broad, and somewhat divergent, apical setae apparently quite smooth and 

 considerably spreading, the innermost but one slightly exceeding half the length 

 of the body. Inner ramus of 2nd pair of legs with the terminal joint almost 3 

 times as long as the first 2 combined, proximal spine of inner edge placed in 

 front of that of the outer, the latter occurring at about the middle of the joint. 

 Last pair of legs with the distal joint oblong quadrangular in form, being scarcely 

 at all expanded distally, inner expansion of proximal joint with a slender denti- 

 culated spinule inside the base of the terminal seta. 



Male not differing much in external appearance from female, but of con- 

 siderably smaller size, and easily recognizable by the strongly-hooked anterior 

 antennae and the distinctly 5-articulate urosome. Genital segment exhibiting at 

 the end on each side a small 3-setose lappet. Last pair of legs slightly differing 

 from those in female. 



Colour yellowish gray, with a slight greenish tinge, caudal setae dark brown. 



Length of adult female 1.30 mm., of male 1.08 mm. 



Remarks. It seems to me beyond doubt that the above-described form 

 is that originally examined by Claus, and named as above. On the other hand, 

 scarcely any of the forms recorded by other authors under that name are 

 identical with Claus's species, but belong to one or other of the 2 nearly- 

 allied species described below as L. Scotti and L. minor. The present species 

 may be easily distinguished from these 2 forms by the total absence of any 

 denticles on the posterior edge of the caudal segments. In the structure of the 

 inner ramus of the 2nd pair of legs, it agrees with L. minor; but the last pair 

 of legs are rather unlike in the 2 forms, as also th(3 size of the animal. 



Occurrence and Habits. This 'form is very common in the upper part of 

 the Christiania Fjord in depths varying from 6 to 30 fathoms, muddy bottom. 

 I have also taken it abundantly in the Trondhjem Fjord, and more rarely off the 

 west coast of Norway. It may be easily obtained by placing the muddy deposits 

 taken up by the aid of the dredge in a shallow vessel with a small amount of 



