B 



01) 



..00 



ed, 



FIG. 3. Paired genital openings of 

 different classes of arthropods. A, the 

 most primitive, of Liinuluspolyphtm n\ : 

 gen. p. generative papilla?; d, duet; //, 

 vas deferens ; t, tendinous stigmata ; r-tii/. 

 stigmata; e, external branchial muscle; 

 ant, anterior lamellar muscle. After Ben- 

 ham, with a few changes. B, lobster 

 (Ifomarus rulf/fn'ix), $ : of, genital 

 aperture on 3d pair of legs; nr, ovary ; 

 u, unpaired portion of tlie same ; <nJ, 

 oviduct. ("', 5, scorpion: ov, ovary, with 

 a single external opening'. D, <$ : t, testis; 

 r<i, vasa deferential ab. seminal vesicle: 

 a, glandular appendage ; /), penis. 

 After Blanchard. K. a myriopod (Glo- 

 iinTtx niiii-yiixttn, $): ox, ovarian tac, 

 laid open; <><!, paired oviducts. F, <f : 

 t, testis ; ijrd, common vas deferens ; ]*<i, 

 paired ducts. After Favrc, fnnu Lang. 

 (r, Li-/>i*>ti<t KiK-i-fiiti'ina, young <J : rd, 

 vas deferens, e<t, ejactilatory duct: </<t. 

 external appendages. After NasMHinw. 

 //. Kphemera. cf, showing thedouble out- 

 lets. After Palmeu. 



