498 PROCEEDINGS OF THE NATIONAL MUSEUM vol.88 



Antennae short ; anterior hook with broad base ; spines present on 

 the ventral surface of the hxteral hook and at the base of the first 

 and second antennae and near the midline of the body. The two 

 latter somewhat stout. Suction cups with ribs composed of a series 

 of rectangular rods, the distal one pointed (fig. 34, a). Maxillae 

 slender, basal plate with three rounded teeth ; first pair of maxillary 

 spines pointed, second pair rounded. 



Thoracic appendages with flagella. Second appendages of male 

 with a bilobed protuberance on the posterior surface of the coxa. 

 Third appendages with a large circular lobe containing the socket 

 projecting posteriorly from the coxa, but overlapping part of the 

 basis (fig. 34, c). On the fourth appendages is the usual natatory 

 lobe on the posterior surface of the coxa. The peg is very much en- 

 larged, but with the usual small tip. Extending along the ventral 

 surface of the peg toward the appendages is a fleshy papilla some- 

 what like that on japonicus (fig. 34, d). 



The female measures to 8 mm. and the male to 6 mm. The host 

 is Hydrocyon goliath from the Congo River, Africa. 



ARGULUS FUNDULI Kr0yer 

 FiGUEE 35 



Argulus funduU Kr0yeb, 1863-64, p. 94, pi. 2, fig. 1. — Wilson, 1902, p. 710, pi. 14 ; 



1932, p. 13, fig. 1.— Thiel, 1904, p. 34. 

 Argulus latus Smith, 1S73, p. 574.— Wilson, 1902, p. 704, pi. 9; 1932, p. 14. 



fig. 2. 



Carapace about as wide as long; cephalic area broad and prom- 

 inent; eyes large and well separated; posterior sinus broad, alae 

 reaching third appendages on both sexes. Abdomen of male el- 

 liptical, half as wide as long, with the testes extending the full 

 length to the sinus; female abdomen broader in proportion, with 

 tips more widely separated; anal furcae basal. The respiratory 

 areas are small and widely separated, somewhat circular in appear- 

 ance; the anterior one ahead of the second maxillae and the posterior 

 larger one behind the first swimming appendages (fig. 35, h). 



The antennae are small, with a slight indication of an anterior 

 knob ; spine at base large, postantennal spines broader. Spine at base 

 of second antennae smaller than those on first. Suction cups large, 

 about one-third the width of the carapace; ribs in rim supported 

 by 15 to 22 imbricate plates and a more elongate basal one (fig. 35, a). 

 Marginal lappets very small. Second maxillae slender; basal plate 

 broad and irregularly triangular, with one to three blunt teeth; the 

 two pairs of postmaxillary spines lacking. 



Swimming appendages without flagella; fourth coxa of female 

 with a small, rounded posterior lobe, whole protopod broader than 



