NO. 1302. AMERICAN PARASITIC ARGULID.^^ WILSON. 703 



21. Carapace abruptly rounded posteriorly, narrowed anteriorly; teeth on basal 



plate long and sharp; anal sinus wide and shallow japonicus, p. 727 



D\ Abdomen cut to or beyond its center with acute lobes; sucking disks 

 0.2 to 0.25. 



22. Carapace lobes very short, barely covering two pairs of legs; abdomen broad 



triangular; anal sinus also broad triangular; papilliv lateral near the tips. 



kpidostei, p. 712 



23. Carapace lobes covering three pairs of legs; abdomen narrow elliptical; anal 



sinus narrow ; papillfe basal .foliaceus, p. 722 



B^. Flagella on second swimming legs rudimentary. 



24. Lateral sinuses in the carapace very deep; legs completely covered. 



scutiformi><, p. 728 

 B'^. No flagella on the swimming legs. 

 C. Carapace orbicular, wider than long; sucking disks enormous, 0.33; second 

 maxillipeds small and weak. 



25. Basal plate with 3 stout teeth; legs very long; lobes on posterior legs large, 



boot shaped; color light yellowish white funduli, p. 710 



26. Basal plate prolonged posteriorly as an entire lobe without teeth; lobes on 



posterior legs small; color a light brown latus, p. 704 



C^. Carapace elliptical, longer than wide. 

 I). Abdomen medium, 0.23, as broad as long, cut less than one-third; lobes 

 broad and well rounded. 



27. Antero-lateral sinuses narrow and small; celphalic area not projecting beyond 



the outline of the rest of the carapace; carapace not covering the bases of 

 the third pair of legs megalops, p. 706 



28. Cephalic area projecting considerably beyond the carapace outline, with a 



rounded protuberance on either side, medium sized in the female and in 

 front of the sinus, very large in the male and posterior to the sinus. Cara- 

 pace covering the third legs entirely dactylopteri, p. 726 



W. Abdomen elongate, 0.3 to 0.45, cut to the center or beyond, lobes lanceolate- 

 acuminate. 



29. Three short teeth on the basal plate; no lobes on posterior legs; sucking disks 



well forward; lateral sinuses of carapace shallow alosa\ p. 707 



30. Only 2 teeth on the basal plate; very long acuminate lobes on posterior legs; 



sucking disks very far back; lateral sinuses deep inelita, p. 725 



31. Lateral rings of carapace fused into a single club-shaped one; teeth on basal 



plate particularly long and sharp stizostethii, p. 713 



A^^'. Carapace very short, without posterior sinus or lobes, covering neither thorax, 

 abdomen, nor feet. 



32. Abdomen cut to the base, with lanceolate lobes; basal plate of second maxil- 



lipeds without teeth elongatm, p. 722 



CHONOPELTIS. 



33. Carapace covering only first and second swimming legs; rudimentary flagella 



on first legs only; no teeth on basal plate of second maxillipeds. 



inermltt, ^. 729 

 DOLOPS. 



A. Carapace lobes reaching posteriorly beyond the base of the abdomen. 

 B. Carapace suborbicular, wider than long. 



34. Carapace entirely covering the feet; abdomen obovate, cut about one-third; 



anal sinus slit-like discoidalis, p. 739 



B^. Carapace obcordate, longer than wide. 



35. Carapace entirely covering the feet; abdomen small and narrow, about 0.25, 



diamond-shaped; color grayish white, marbled with black dorsally. 



kollari, p. 732 



