62 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 121 



Specimens studied. — Single collections from Sarasota, Fla., 

 from the following hosts: Sphryna mokarran, Galeocerdo cuvier, 

 Carcaharinus milberti, and Carcharinus leucas. A single collection 

 from Socorro Island (Pacific) from Carcharinus galapagensis. From 

 Nosy Be Madagascar: Sphyrna lewini (4 collections), Carcharinus 

 maculipinnis (8 collections), C. leucas (4 collections), Scoliodon 

 palasorrah (1 collection), and Galeocerdo cuvier (1 collection). 



Female. — Body form as in figure 305. Total length 6.8 mm (based 

 on an average of 5 specimens). Greatest width 3.5 mm (measm*ed at 

 widest part of cephalon). Cephalon rounded, somewhat wider than 

 long (2.5 by 2.7 mm). Thoracic segment 2 expanded laterally. 

 Segment 3 small. Segment 4 expanded laterally somewhat but no 

 plates present. Genital segment 2.6 mm long and narrowed an- 

 teriorly; posterior border with deep median sinus. Abdomen (fig. 

 306) 1-segmented Caudal rami (see fig. 306) attached to abdomen 

 distally and with 6 terminal setae, inner 4 plumose and longer than 

 outer 2 



Oral area with adhesion pads associated with first and second 

 antennae and maxilliped (see fig 307). First antenna (fig. 308) 

 2-segmented, armed as in figure. Adhesion pad produced to form 

 a hooklike process. Second antenna (see fig. 307) of usual form. 

 Mandible and mouth tube of usual form. First maxilla (fig. 309) a 

 broad lobe with a small outer spine and an anterior group of 3 setae. 

 Second maxilla of usual type. Maxilliped (fig. 310) with a short 

 terminal claw rounded at tip. Tip of claw is opposed by a raised 

 area with a central crater-like depression. 



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



Terminal exopod segments of legs 1-3 (figs. 311-313) with spines 

 armed as in figures. Setae of these legs pinched near base and often 

 broken off at this point (see figs. 311-313). Leg 4 (fig. 314) with 

 each ramus of 1 joint. Endopod unarmed. Leg 5 (fig. 315) con- 

 sisting of 2 short setae, 1 naked, the other with a serrate fringe. 

 Leg 5 located lateral to caudal rami on ventral surface of genital 

 segment (see fig. 306). Leg 6 absent. 



Egg strings long and straight. 



Color in life cream. 



Male. — ^Body form as in figure 316. Total length 5.4 mm (based 

 on an average of 2 specimens). Greatest w^idth 3.1 mm (measured at 

 widest part of cephalon). Lateral margins of thoracic segment 2 

 somewhat alate. No dorsal plates present. Genital segment slightly 



