82 



PROCEEDINGS OF THE NATIONAL MUSEUM 



Table 4. — Measurements of Sphyrna zygaena (proportions expressed in thou- 

 sandths of total length) — Continued 



Table 5.- 



-Measurements of Sphyrna lewini (proportions expressed in thousandths 

 of total length) 



Size range in mm. (N=number of specimens) 



400-599 N 600-799 N 800-900 N >1,000 



Head widtii 

 Atlantic 

 Eastern Pacific 

 Western Pacific and 

 Indo-Austraiia 



Intemarial distance 

 Atlantic 

 Eastern Pacific 

 Western Pacific and 

 Indo-Australia 



Snout to symphysis 

 Atlantic 

 Eastern Pacific 

 Western Pacific and 

 Indo-Australia 



2 280-284(282) 16 268-302(287.0) 6 268-285(274.0) 1 257 

 - — 8 260-291(276.1) 4 256-277(267.5) — — 



2 266-285(275.5) 12 246-287(264.8) 3 261-280(269.0) — — 



2 205-213(209.0) 18 190-218(203.9) 6 193-212(201.7) 1 181 



— 8 187-211(200.3) 4 184-202(195.8) — 



2 197-204(200.5) 12 180-214(193.3) 3 186-205(197.3) — 



2 81-86(83.6) 16 72-83(79.1) 

 - — 8 73-81(77.8) 



2 83-85(84) 12 69-83(73.9) 



6 67-77(71.3) 1 64 



4 68-73(70.3) — — 



3 66-70(67.3) — — 



