ART. 17. AMERICAN PARASITIC COPEPODS WILSON. 7 



strings reach to about the center of the long anal setae, eggs in seven 

 or eight rows, about 15 in each row. 



First antennae cylindrical, slightly widened and flattened at the 

 base, indistinctly six-jointed, and armed with rather small setae. 

 Second antennae small, the terminal joint tipped with two long, 

 curved claws, with three setae on the inner margin and a corrugated 

 area similar to that in Bomolochus on the outer margin. Maxilli- 

 peds with a stout and well developed basal joint and a slender ter- 

 minal claw, the latter bent into the shape of a sickle. First swim- 

 ming legs with each ramus composed of a single joint and armed 

 with broad and flattened setae; second, third, and fourth legs with 

 toothed spines on their outer margins, five on the second and third 

 legs and three on the fourth legs. In addition to the teeth along 

 its outer margin each spine has a terminal filament attached to its 

 inner margin near the tip (fig. 18). 



Color. — (Preserved material) a uniform light yellowish-brown. 



Total length, including anal setae, 2 mm. Cephalothorax 0.50 mm. 

 long, and the same width. Free thorax 0.80 mm. long ; second seg- 

 ment 0.35 mm. wide. 



{occidentalis, western, American, in allusion to the fact that all 

 the preceding species of the genus have been obtained from the 

 Mediterranean.) 



Remarks. — This genus was established by Brian in 1906 to include 

 some tiny parasites found upon fish in the Bay of Naples. Two 

 other species, also from the Mediterranean, were transferred to this 

 genus by the present author in 1911. The species here described 

 is the first to be found outside of the Mediterranean and this fact 

 has been emphasized in the specific name. 



PARAPANDARUS, new genus. 



Generic characters of female. — Body elongate-obovate ; cephalo- 

 thorax narrowed anteriorly, cephalic area clearly differentiated, no 

 posterior lobes. Second, third, and fourth thoracic segments each 

 with a pair of dorso-lateral plates; fourth legs visible dorsally on 

 either side of the genital segment behind the third pair of plates. 

 Genital segment not hardened on dorsal surface; sixth segment in 

 the form of a rounded lamina fitting into the posterior sinus of the 

 genital segment as in Pandarus. Abdomen one- jointed, with modi- 

 fied anal lamina. Egg strings attached to genital segment between 

 sixth segment lamina and abdomen. First three pairs of legs with 

 two-jointed rami; rami of fourth pair one-jointed. Second antennae 

 much enlarged, prehensile; maxilliped with terminal claw and not 

 a pad. 



Generic characters of male. — Carapace broad; posterior lobes 

 straight and bluntly rounded; no secondary lobes; lateral grooves 



20183— 25— Proc.N.M.vol.64 28 



