58 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Two females and 2 males (retained by author) from either Makaira 

 ampla? (Poey) or Istiompax marlina (Jordan and Hill) examined at 

 Honolulu Fish Market (USFWS). Two females and 1 male (retained 

 by author) from external surface of Makaira ampla? (Poey) captured 

 in Hawaiian region (USFWS) . 



Measurements. — (In mm) 18 females and 6 males: 



female 



male 



mean 

 12. 02 



range 

 10. 20-12. 90 



mean 

 10.25 



range 

 9. 53-10. 95 



5. 81 5. 03- 6. 08 



5. 06 4. 35- 5. 63 



3. 21 2. 40- 3. 60 



3. 03 2. 70- 3. 30 



2. 29 1. 67- 2. 55 

 1. 76 1. 33- 2. 11 



1. 61 1. 41- 1. 78 



1. 06 0. 89- 1. 30 



3. 34 2. 40- 4. 65 



2. 16 1. 95- 2. 25 



1. 94 1. 88- 2. 03 



1. 83 1. 52- 2. 04 



1. 08 0. 93- 1. 15 



Total length, excluding caudal setae 

 Length of cephalothorax, including 



frontal region 5. 81 5. 03- 6. 08 4. 63 4. 35- 4. 88 



Width of cephalothorax 5. 06 4. 35- 5. 63 4. 00 3. 60- 4. 28 



Length of genital segment, excluding 



fifth legs 

 Width of genital segment 

 Length of abdomen 

 Length of alae (male N = 5) 

 Length of fifth leg, measured along 



outer margin (male N = 5) 1. 61 1. 41- 1. 78 1. 56 1. 30- 1. 63 



Length of caudal rami 1. 06 0. 89- 1. 30 1. 23 1. 04- 1. 37 



Length of egg strings (12 strings) 



Description. — Female cephalothorax (fig. 22a) ovoid, consisting 

 of cephalon and first 4 thoracic segments. Frontal region distinct, 

 with small, median, knoblike projection and frilled membrane on 

 anterior margin; heavily sclerotized articulation surfaces (articula- 

 tion with cephalothorax proper) present on posterior smiace. Lat- 

 eral cephalothoracic margins flatly convex although slightly irregular, 

 with narrow frilled membrane and row of plumosities, membrane 

 extending around posterior end of broadly curved posterior lateral 

 cephalothoracic region, terminating adjacent to origin of posterior 

 sinus. Posterior sinus (fig. 22c) irregularly U-shaped, open end 

 constricted, lateral margin formed by heavily sclerotized extension 

 of median cephalothoracic region, small, lappet-shaped dorsal projec- 

 tion present at anterior end of sinus in addition to small membrane 

 along lateral margin of sinus and second, posteriorly projecting mem- 

 brane, from dorsal lateral surface. Median cephalothoracic region 

 extending to or slightly past posterior end of lateral cephalothoracic 

 regions, margin irregular. Dorsal siuface of cephalothorax Avith 

 numerous haulike projections laterally, gi\^ng fuzzy appearance; 3 

 rows of long, slender, bifid plumosities present on lateral regions, 

 lateral to ocular region. Dorsal surface also \\\ih numerous spinules, 

 primarily on median cephalothoracic region, extending around ocular 

 region and on posterior end of median cephalothoracic region. Dorsal 

 cephalothoracic grooves distinct, major grooves forming irregular H. 

 Eyes distinct, in anterior third of cephalothorax. 



