PARA.SITIC COPEPODS— WILSON. 415 



PANDARUS SATYRUS Dana. 

 Plate XXXI. 



Pandarus satyrus Dana, 1852, p. 1368, pi. xcv, figs. 2 a-c. 

 Pandarns zygxnx Brady, 1883, p. 134, pi. lv, fig. 3. 



Female. — General body outline short and wide; carapace widening 

 posteriorly until it becomes broader than long, the posterior lobes 

 short and blunt; posterior margin nearly straight and armed with 

 eight or ten small spines or teeth. Frontal plates narrow at the cen- 

 ter, wider at the ends, covering most of the basal joints of the first 

 antennae. Eyes concealed in mature specimens by the dark pigment 

 of the carapace. 



Thorax plates of the second segment elliptical, strongly divergent, 

 wide and long, reaching beyond the center of those on the fourth 

 segment; central plate between their bases narrow. Plates of the 

 tliird segment small, nearly circular in outline, with a shallow median 

 sinus; those of the fourth segment also circular, with a wide but not 

 very deep median sinus; they overlap the genital segment beyond 

 its center. 



Genital segment ovate, two-thirds as wide as the carapace, and 

 produced posteriorly into a slender conical process on either side of 

 the sixth segment plate and directly over the bases of the anal laminae. 

 Abdomen short and wide, the dorsal or body portion the same length 

 as the ventral plate and reaching about to the center of the sixth 

 segment plate. Anal laminge wide and longer than the sixth seg- 

 ment plate, their outer margins considerably thickened, the inner 

 wings strongly divergent and irregularly toothed. Sixth segment 

 plate ovate or elliptical, from one-half to two-thirds as long as the 

 genital segment. 



First antennae long and slender, the terminal joint club-shaped, as 

 long as the basal joint, and bluntly rounded, both joints well armed 

 with short setae. Second pair small with a weak terminal claw and 

 one accessory spine. First adhesion pads semielliptical, their outer 

 margins nearly straight, their anterior ends projecting beyond the 

 margin of the carapace; second pair nearly circular, their diameter 

 one-third less than the length ot the first pair; third pair small and 

 elliptical; fourth pair also elliptical and a little longer than wide. 



First maxillipeds of the usual pattern but stout, the two joints of 

 the same length, the terminal claws corrugated; second pair swollen 

 and armed with a single pair of forceps knobs, close together at the 

 center of the ventral surface. 



First swimming legs small and weak, very similar to those of 

 cranchii, the base of the terminal joint in the exopod and its tip in 

 the endopod being covered with a large spiny pad or cushion. Second 

 legs also weak, the rami the same size and their joints the same 



