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PROCEEDINGS OF THE NATIONAL MUSEUM 



Figure 3.—B. campestris: a, Right sixth thoracic appendage of a male 26 mm. long, X 13.5. 

 br. /., branchial lamina; br. s., branchial sac; end., endopodite. Seniles of the setae and 

 spinules of the spines have been omitted, b, Right sixth thoracic appendage of a female 

 27 mm. long, X 13.5. c, Spine from distal median border of endopodite of sixth thoracic 

 appendage of a female, X 280. 



