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S. KARAYTUG AND G.A. BOXSHALL 



Fig. 22 Scanning electron micrographs of P.fimbriatus. Adult male antennule. A, Dorsal view, with segment 5 arrowed; B, Lateral view, with sheath 

 on segment XV arrowed; C, Modified seta on proximal segment; D, Segment proximal to geniculation, with pore on modified element arrowed. 

 Scale bars A = 30 urn, B = 25 urn, C = 6 urn, D = 5 urn. 



(range 226 to 247 um, n=10). Body (Fig. 17C) differing from 

 adult female as follows: urosome 6-segmented, comprising fifth 

 pedigerous, genital and 4 free abdominal somites; 

 ornamentation of spinule rows as in Fig. 14D. Genital somite 

 bearing paired genital apertures ventrally (Fig. 14C). 



Caudal rami about 2.5 times longer than broad, ventral 



surface unornamented. Large medial seta (V) relatively longer 

 than in female. 



Antennule 15-segmented (Figs 21A-C). Segment 1 armed 

 with 9 setae; 1 seta large and modified (Fig. 22C), by 

 ornamentation of strong spinules in proximal and mid sections, 

 tapering to fine point distally; segment ornamented with curved 



