no. 1404. PARASITIC COPEPODS—CALIGIDJE— WILSON. r)l7 



13. Genital segment subquadrate, as wide as long; no lobes; fourth leg spines all 



serrate edwardsi, new species, p. 627. 



13. Genital segment obovate, longer than wide; lobes very wide and blunt; no serrate 



spines parviventris, new species, p. 635. 



13. Genital segment obovate, longer than wide; no lobes; furca branches bifid, 



branchlets acute bifurcatus, new species, p. 637. 



14. Abdomen four-jointed, as long as genital segment; the latter trapezoidal. 



pacificus (Gissler, 1883), p. 642. 

 14. Abdomen two-jointed, as long as genital segment; latter elliptical; males. 



pollachii (B-Smith, 1896). 

 14. Abdomen two-jointed, shorter than genital segment 15. 



14. Abdomen one-jointed, as long as genital segment; latter ovate; lobes short, 



pointed molvse (M-Edwards, 1836-49). 



15. Males, both fifth and sixth legs visible; genital segment narrow-ovate; abdomen 



joints unequal nordmannii (M-Edwards, 1840), p. 623. 



15. Females, genital segment without any visible appendages 16. 



16. Genital segment obcordate; abdomen twice as long as wide; joints equal; 

 free segment as long as wide; fourth legs four-jointed, five spines. 



crabro (Kroyer, 1863). 



16. Genital segment obcordate; abdomen twice as long as wide; joints equal; 



free segment three times as wide as long; fourth legs three-jointed, four 



spines intercurrens ( Kroyer, 1863 ) . 



16. Genital segment quadrate; abdomen as wide as long; joints equal; fourth 



legs four-jointed, five spines pedoraZ/s (Midler, 1776). 



16. Genital segment obcordate; basal abdomen joint four times terminal; fourth 



legs three-jointed, five spines grolimcmni (Kroyer, 1863). 



1 7. Abdomen two-jointed, longer than rest of body; genital segment triangular, twice 



the carapace pharaonis (Nordmann, 1832) . 



1 7. Abdomen two-jointed, longer than genital segment; females 18. 



1 7. Abdomen two-jointed, shorter than genital segment 19. 



1 7. Abdomen one-jointed, three times the genital segment; latter subquadrate, spiny; 



lobes short .fores ( van Beneden, 1892 ) . 



17. Abdomen one-jointed, a little longer than genital segment 22. 



17. Abdomen one-jointed, shorter than genital segment 23. 



18. Genital segment oblong, half the carapace; basal abdomen joint four times 

 terminal longipalpus (B-Smith, 1898, b). 



15. ( renital segment oblong, as large as carapace; basal abdomen joint twice ter- 



minal innominatus new species, p. 656. 



19. Females, abdomen distinctly more than half as long as the genital segment; fifth 



legs concealed dorsally 20. 



ID. Females, abdomen clearly less than half as long as the genital segment; fifth legs 



concealed in dorsal view 21. 



20. Genital segment ovate; no lobes; fourth legs nearly reaching its tip. 



slurionis (Kroyer, 1837). 

 20. Genital segment elliptical, lobes large; fourth legs not reaching its center. 



thompsoni (Baird, 1850), p. 619.' 

 20. Genital segment elliptical; loin's broad, hut short; abdomen half its width. 



salmonis (Kroyer, 1838), p. 640. 

 21. Genital segmenl quadrate, as wide as long; joints of the abdomen nearly equal. 



pectornlis (Midler, 1776). 

 21. Genital segment elongate, twice as long as wide; basal abdomen joint three times 



terminal bagri (Dana, 1852). 



21. Genital segment flask-shaped, a fifth longer than wide; basal abdomen joint the 

 longer qvadratus ( Kroyer, 1863). 



