NO. 3600 GLOIOPOTES — CRESSET 7 



mm) ; greatest width 4.29 mm (3.75-4.95 mm) based on an average of 

 28 specimens. The specimens from /. orientalis tend to be smaller 

 than those from other hosts (10.16 x 4.13 mm), average of 10 speci- 

 mens. Genital segment (fig. 33) longer than wide (2.55 x 2.17 mm). 

 Fifth legs extend posteriorly to about middle of abdomen. Dorsal 

 surface of genital segment and abdomen with spines usually arranged 

 as in figure. This arrangement may vary from specimen to specimen 

 even mthin the same collection. 



Appendages as in G. ornatus and G. americanus. 



Remarks. — I have examined the type specimens of G. costatus 

 Wilson and determined this species to be s3monymous with G. huttoni. 

 Lewis (1967) points out that the tripartite spine of leg 3 is actually 

 bipartite and does not difl^er from G. ornatus as claimed by Wilson. 

 My own examination of the type specimens confirms Lewis' 

 conclusions. 



Gloiopotes tvatsoni Kirtisinghe 



Figures 38-39 



Gloiopotes watsoni Kirtisinghe, 1934, p. 167. — Rao, 1951, p. 254. — Shiino, 1959, 



p. 348.— Yamaguti, 1963, p. 104.— Hewitt 1964, p. 95. 

 Gloiopotes auriculatus Barnard, 1957, p. 11. — Hewitt, 1964, p. 95. 



Specimens studied.- — Eight collections from Makaira nigricans, 

 4 collections from Tetrapterus audax, 4 collections from Makaira 

 indicus, 6 collections from Istiophorus orientalis, all from the Indian 

 Ocean; 1 collection from Makaira nigricans, collected off Peru during 

 the Southeastern Pacific Biological Oceanographic Program; 5 

 USNM collections from Makaira nigricans from Taiwan, Hawaii, 

 and Panama Bay; 2 USNM collections from Istiophorus orientalis 

 off the Pacific coast of Mexico; and 2 USNM collections from "marlin" 

 caught oft' Tahiti. 



Female. — Body form in general as in G. huttoni except for difl'er- 

 ences noted below. Total length 12.16 mm (10.80-13.80 mm). 

 Greatest width 5.56 mm (4.480-6.45 mm) based on an average of 

 91 specimens. The average length and width measurements varied 

 from one host group to the next, those copepods on /. orientalis 

 having the smallest average size and those on T. audax largest (see 

 p. 12). 



Dorsal plates of 4th thoracic segment with lateral margins held at 

 an angle to long axis of the body as in G. huttoni. 



Genital segment (fig. 38) wider than long (3.0 x 3.2 mm), average 

 of 91 specimens from 4 hosts. Lateral margins rounded, without 

 conspicuous bulge, ornamented with row of small spinules. Dorsal 

 surface ornamented as in G. huttoni. Posterior lobe shorter than in 

 G. huttoni (see pi. 3). Abdomen and caudal ramus as in G. huttoni. 



