616 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxvm. 



3. Females, genital segment obovate, longer than wide; lobes long, conical; 



fourth legs long longipes, new species, p. 618. 



3. Females, genital segment orbicular, a fourth wider than long; lobes short; 



fourth legs short chileyisis, new species, p. 658. 



4. Males, genital segment obovate, three-fifths the carapace; fifth and sixth 



legs separated nordmannn (M-Edwards, 1840), p. 623. 



4. Males, genital segment obldug, one-fourth the carapace; fifth and sixth 



legs close together erecmni (Thomson, 1890) 



5. Males, both fifth and sixth legs showing plainly (5. 



5. Males, only fifth legs showing, but with a pair of dorsal papilhe at the base of 



the genital segment 7. 



5. Males, only fifth legs showing; no pajjilhe 8. 



5. Females, genital segment witlK)ut appendages of any sort 9. 



6. Genital segment barrel-shaped, sides curved; no lobes; fourth legs reach- 

 ing its center pecforalis (Midler, 1776). 



6. Genital segment ol^long, sides jtarallel; well lobed; fourth legs reaching 



abdomen tip cJdlensis, new species, p. 658. 



7. Genital segment obcordate, one-third the carapace; fourth legs reaching its 



center only (ipj)endiculatus (Kroyer, 1863). 



7. Genital segment quadrate, one-fifth the carapace; fourth legs reaching fully to 



its tip robustus (Kroyer, 1863), p. 646. 



7. Genital segment reniform, wider than long; anterior appendages lateral rather 



than dorsal crahro (Kroyer, 1863 ) . 



8. Genital segment semilunar, wider than long; fourth legs nearly reaching its 



tip rotundiverdris (B-Smith, 1898, b). 



8. Genital segment diamond-shai)ed, longer than wide; lobes short, acute; fourth 



legs short J}agri ( Dana, 1852) . 



9. Genital segment ovate, wider than long; lobes acute, si)ine-like; fourth legs reach- 

 ing its tip suhmi (Brady, 1883). 



9. Genital segment elliptical, longer than wide; lobes broad, rounded; fourth legs 



reaching its center nordmannil (M-Edwards, 1840 , p. 623. 



9. Genital segment sub(iuadrate, wider than long; lobes broad, rounded; fourth 



legs reaching abdomen tip erecmni (Thomson, 1890). 



10. Males, both fifth and sixth legs showing plainly 11. 



10. Females, only the fifth legs showing dorsally 12. 



10. Females, no appendages visi))le dorsally 13. 



11. Genital segment elliptical; fourth legs reaching abdomen tij); branches of furca 



bifid }d])})<iglussi (Kroyer, 1837), p. 625. 



11. Genital segment ovate; fourth legs not reaching its tip; furca branches flattened, 



foliaceous edivardsi, new species, jj. 627. 



11. Genital segment elliptical; fourth legs medimn; furca branches acuminate, close 



together dissiinulaius, new species, p. 631. 



11. Genital segment (juadrate; fourth legs medium; furca branches blunt, flanged, 



widely separated parnrenlris, new species, p. 635. 



12. Genital segment orbicular; abdomen minute, spindle-shaped, much widened 



at center roiundirevtris ( B-Smith, 1898, b) . 



12. Genital segment broad flask-shaped; flfth legs longer than abdomen. 



cosM/phi (Kroyer, 1863), p. 644. 

 12. Genital segment orbicular, wider than long; abdomen nearly covered by it 



posteriorly ditfsimulatus, new species, p. 631. 



13. Genital segment elliptical, longer than wide; lobes short, narrow; furca 



branches l)ifid, truncate hlppoylossi (Kroyer, 1837), p. 625. 



13. Genital segment orbicular, wider than long; no lobes; fourth legs two-jointed 

 with three spines brachyurus (Heller, 1865). 



