3. 3570 PANDARIDAE — CRESSET 61 



Legs 1-4 biramose with spine and setal formula as follows: 



Leg 1 (fig. 301) with an interpodal adhesion pad as in figure. Leg 2 

 (fig. 302) armed as in figure. Leg 3 (fig. 303) with innermost seta of 

 last exopod segment reduced. Leg 4 (fig. 304) with each ramus 

 1 -segmented and armed as in figure. Leg 5 small process bearing 2 

 short setae (see fig. 296). Leg 6 absent. 



Egg strings long and straight. 



Color in life cream. 



Male.— Wilson in 1905 described a male of Nesippus alatus 

 (=orientalis). I have examined this type specimen and have con- 

 cluded that it is immature and does not indicate the nature of the 

 adult male; consequently, the true adult male of this species is 

 unknown. 



Discussion. — This copepod has been reported from a number of 

 sharks and is probably cosmopolitan in distribution. It seems to be 

 restricted to inshore species and is usually found in the mouth and 

 gUl arches of the host. 



Capart (1953) states that more material will eventually show 

 alatus and angustatus to be synonymous with orientalis. As a result 

 of my collections and the material I have examined, I am convinced 

 that this interpretation is correct and have placed the two former in 

 synonymy. Nesippus ornatus described by Thomsen in 1949 is also 

 the same as orientalis. Heegaard described 2 new species (incisus 

 and australis) in 1962. He noted the similarity to alatus and orientalis 

 and I believe that these 2 species should be placed in synonymy. I 

 have examined material from the North Atlantic, Caribbean, and 

 Indian Ocean and conclude that my own collections represent a single 

 cosmopolitan species that is found on a wide variety of hosts. The 

 exact shape of the dorsal thoracic plates of segment 4 shoidd not be 

 regarded by itself as a specific character. The presence of this plate 

 separates it from the other known species. It also differs from other 

 species in the nature of the adhesion pad of the first antenna. 



Nesippus crypturus Heller, 1868 



Figures 305-324 



Nessipus crypturus Heller, 1868, p. 196. — Bassett-Smith, 1899, p. 459. — Wilson, 

 1907, p. 425; 1935a, p. 3.— Barnard, 1955, p. 265.— Yamaguti, 1963, p. 124. 

 Nesippus occullus Wilson, 1924b, p. 214. — Yamaguti, 1963, p. 124. 

 Nesippus costatus Wilson, 1924b, p. 213.— Yamaguti, 1963, p. 124. 

 Nesippus gracilis Wilson, 1935a, p. 4. — Bere, 1936, p. 595. — Yamaguti, 1963, p. 124. 



