305 



201. Huntemannia jadensis, Poppe. 



(PI. CGIX). 



Huntemannia jadensis, S. A. Poppe, Die freilebenden Copepoden des Jadebnsens. Abhandl. d. 

 natnrw. Voreins zu Bremen, Bd. IX, p. 201, PI. VII, figs. 1023. 



Specific Clir<i<-t<'rx. Female. Body not very slender, but gradually taper- 

 ing from front to back, without any sharp demarcation between the two divisions, 

 hind edges of the segments finely denticulate. Cephalic segment nearly as long 

 as the 4 succeeding segments combined, and produced in front to a narrow conical 

 rostral projection clothed at the somewhat blunt tip with fine hairs. Last pedigerous 

 segment scarcely smaller than the preceding one. Urosome much shorter than 

 the anterior division, and tapering rapidly behind, last segment somewhat bulging 

 at the end, with the anal opercle perfectly smooth. Caudal rami about the length 

 of the anal segment, and of nearly equal width throughout, extending straight back- 

 wards, each produced at the end to a strong flattened spine of about the same length as 

 the ramus itself, and slightly bent outwards at the tip, being accompanied outside by 

 a short denticle, inside by a spiniform seta arising from a knob-like prominence ; 

 outer edge of the ramus with 2 short setae near the base, dorsal face with another 

 seta issuing from about the middle. Anterior antennae much shorter than the 

 cephalic segment, 5-articulate, 1st joint very large and broad, about the length 

 of the 2 succeeding joints combined, terminal part scarcely longer than 3rd joint, 

 though composed of 2 well-defined joints. Posterior antennae with the terminal 

 joint shorter than the basal one, and gradually widening distally, being armed 

 with 5 strong blunt spines, inside which is a short seta accompanied by a number 

 of small spinules, outer ramus attached near the end of the basal joint in the 

 form of a small lamella carrying 4 setae. 1st pair of legs remarkably short and 

 stout, with the 1st basal joint dilated in a peculiar manner, forming a lamellar 

 expansion covering over the succeeding joint in front, outer ramus distinctly 

 3-articulate, with the joints successively diminishing in size, last joint very short and 

 armed at the end outside with 2 somewhat unequal spines accompanied by 2 setae, 

 the inner of which is much the longer; inner ramus consisting of a single rather 

 coarse joint tipped with 2 short, blunt spines. The 3 succeeding pairs of legs com- 

 paratively small, outer ramus composed of only 2 joints defined by an oblique suture, 

 the distal one spatulate in form and carrying at the end from 5 to 6 long setae 

 assuming outside gradually the character of slender spines; inner ramus much 

 reduced, especially on the posterior pairs, forming a small nodiform joint tipped 

 with a slender seta. Last pair of legs comparatively small, distal joint short, 

 lamelliform, edged with 5 short seta j ; inner expansion of proximal joint rounded, 



U Crustacea. 



