PARASITIC COPEPODS — WILSON 545 



tip; second maxillae and maxillipeds uncinate. First four pairs of 

 legs biramose, rami 3-segmented, fifth pair uniramose and 1-segmented. 



Genotype. — Pannulodes verrucosa, new species. 



PARMULODES VERRUCOSA, new species 

 Plate 30, Figtjkes 150-160 



A single female, the type of the genus and species, U.S.N.M. No. 

 79000, was obtained from a coral tidal flat at Matecumbe, Fla., in 

 July 1925. 



Female. — The anterior carapace and the posterior dorsal plate 

 are evenly rounded, with uniform elliptical outlhie, broken only by 

 the interval of the second segment. The outer rim is slightly thick- 

 ened and punctured with a row of skin glands extending around the 

 entire margin and similar to those in the larvae of the genus Argulus. 

 They are farther apart and slightly smaller in the posterior plate 

 than in the carapace. When enlarged they exhibit definite structure 

 as seen in figure 151 but their function is very problematical. Tlie 

 second segment is covered with a narrow ribbonlike plate whose ends 

 are turned down ventrally and when lifted up to a level with the 

 carapace do not quite reach the margin of the latter. The posterior 

 corners of the carapace are prolonged slightly backward, the anterior 

 corners of the plate slightly forward, and they almost meet in the 

 center of the space between the two. The fifth segment is widened 

 a little at its posterior margin through the bases of the fifth legs, 

 and the genital segment is widened across its anterior margin through 

 the openings of the oviducts. The abdomen is made up of two short 

 segments of about the same length, each wider than long. The caudal 

 rami are about the same width and length, inclined a little outward, 

 each tipped with three setae. 



The first antennae are attached some distance behind the anterior 

 margin. Each is made up of 18 segments, the basal segment very 

 long and stout, the remaining segments short, of varying lengths, and 

 diminishing gradually in width distally. The terminal segment just 

 reaches the margin of the carapace, and every segment carries one or 

 more setae, the proximal ones much longer than the distal. The basal 

 segment of the second antenna is stout and longer than the other two 

 segments combined, with a short spine at its inner distal corner. The 

 second segment is uniform in width and unarmed, the third segment 

 is one-fourth as long as the second, with a tiny spine on its outer 

 margin. The terminal claw is twice as long as the third segment, 

 nearly straight and abruptly narrowed at its tip. 



The mouth tube is strongly swollen at its base, then narrowed into 

 a long slender tube extending backward between the bases of the legs. 



558871—44 2 



