NO. 1302. AMERICAN PARASITIC ARGULIDJE— WILSON. 727 



5 mm.; length of abdomen 1.85 mm.; breadth 2.2 mm. Male about 

 live-seveuths this size. 



Habitat. — The East Indian Ocean in the branchial cavity of Dactyl- 

 optefnis voUtans Linnajus. 



{dactylopter!., from its host.) 



ARGULUS INDICUS Weber 

 Argulus indieus Webee, 1892. 



Female similar to foliaceus., ou^ with a carapace wider than long 

 and overlapping the abdomen. Abdomen about 0.25, wider than 

 long, with a short, narrow sinus. 



Swimming legs long; lobes of the last pair hatchet-shaped and half 

 as long as the legs themselves; anterior pairs with Hagella. No color 

 given and the only figure one of the posterior legs. 



Ifahifat., from the East Indian Archipelago. Host unknown. Single 

 specimen a female. 



{hidicus, of or belonging to India). 



ARGULUS AFRICANUS Thiele. 



Argulus africamis Thiele, 1901. 



Female similar to foliaceus but with a broader shield; abdomen 

 with shorter rounded lappets. Lobes on the posterior legs hatchet- 

 shaped, as in indieus, but smaller; anterior antennee stout. In the 

 male the carapace and abdomen are longer and narrower than in the 

 female. In addition to the regalar peg and semen receptacle the sec- 

 ond leg carries a stout papillary wart on the posterior side opposite 

 the base of the exopodite of the third leg. The third leg itself is 

 covered with numerous papillary warts, especially on its dorsal and 

 anterior surfaces. The basal plate is small, oval, and pointed ante- 

 riorly. No color given; no figure published. 



Length in both sexes 7 mm.; width in female 4. 5 mm.; in male -I. 



Habitat. — Numerous specimens from Langenburg on species of 

 Claria^ a female from Albert Edward Sea and a female from the Nile. 



{Africanus=oi or belonging to Africa.) 



ARGULUS JAPONICUS Thiele. 

 Argulus japonicus Thiele, 1901. 



Female similar to foliaceus, but carapace more abruptly rounded 

 posteriorly, broader, and somewhat narrowed anteriorly. 



Swimming legs tolerablj' long; lobes of the last pair small and 

 rounded. Al^domen terminating in two small rounded lobes, widely 

 separated. Color brownish; no figure published. 



Length of the single specimen 4 mm.; breadth 2.7 mm. 



Habitat. — From Yeddo, Japan. Host unknown. Single specimen, 

 a female. 



{Jaj>07vicus=of or belonging to Japan.) 



