﻿COPEPOD GENUS PUPULINA (CALIGOIDA) — WILSON 259 



uniquely distinguished by the pair of transverse lines of the mid- 

 cephalic area, these carried backward by curved lines ending in small 

 loops; midanterior portion with a design similar to that of the male 

 (pi. 14, fig. 3), but not entirely clear in available specimens. Ventral 

 supporting ribs of the lateral area not visible dorsally in holotype, 

 partially so in paratype. 



Free segment about one-fourth wider than long, posterior edge 

 straight. Genital segment with a narrow neck, anterior portion (ex- 

 clusive of neck and processes) a little longer than wide; sides round- 

 ing out from neck and extending straight backward in long, narrow 

 processes, almost twice as long as the main portion of the segment 

 and reaching a little beyond the tip of the caudal rami ; in the para- 

 type female, the processes slightly shorter than the rami. Processes 

 well rounded apically, partially covering the abdomen in the proximal 

 inner area; sides curved under and more or less grooved ventrally; 

 the surface integument relatively thin and lacking hairs or spinules. 

 Top of dorsal pattern of segment with well-rounded lobe in middle, 

 slanting sides, and five posterior lobes, of which the central is the 

 longest. 



Abdomen slender, elongate, with three distinct segments ; the mid- 

 dle the longest, the anal the shortest; the first two segments together 

 six times the length of the anal ; margin set with very fine short hairs. 

 Caudal rami about one-fourth as broad as long ; differing from those 

 of otlier females of the genus in being somewhat flattened, very short 

 and broad ; equaling only a little more than a fourth of the total length 

 of the abdominal segments ; slightly less than twice the length of the 

 anal segment ; tipped with three very short setae. 



First antenna with fewer plumose setae on the basal segment than in 

 P. -flores^ armed terminally as in plate 14, figure 7. Second antenna 

 (pi. 15, fig. 1) with a stout basal spinous process, terminal claw ex- 

 ceptionally long, armed proximally with a stalked spine and a long 

 seta. Lateral hook (pi. 15, fig. 2) very short, hardly curved, setae of 

 basal papillae little developed. Mouth tube as for the genus; claw of 

 mandible (pi. 15, fig. 11) with 12 teeth. Anterior ventral accessory 

 processes short, narrow, membranous spines (pi. 15, fig. 3) , larger than 

 those of minor, smaller than those of -flores. 



First maxilla (pi. 15, fig. 4) with posterior lobe of outer portion not 

 extended beyond base of inner piece; setae of papilla subequal (pi. 

 15, fig. 8), the shortest divided near the tip, the middle one with the 

 basal part rounded and swollen ; inner piece with distal extension very 

 slender. Posterior claw of second maxilla (pi. 15, fig. 5) about half the 

 length of the anterior. Maxilliped (pi. 15, fig. 6) with moderately 

 strong claw, set with a slender seta. Posterior ventral accessory proc- 

 ess (j)l. 15, fig. 7) a somewhat large, membranous, rounded flap at- 

 tached to a narrow chitinous bar. 



