POTTHOFF anil KELLEY: OSTEOLOGICAL DEVELOPMENT IN SWORDFISH 



Figure 17.— Left lateral view of the adult 

 caudal complex from Xiphias gladius of un- 

 known length, 48 lb, showing fin ray articula- 

 tion in relation to the caudal parts. Ep, 

 epural; Hs, autogenous haemal spine; PCR, 

 principal caudal rays; Ph, parhypural; Pu, 

 preural centrum; SCR, secondary caudal 

 rays; Un, uroneural; Ur, urostyle. Caudal 

 complex bones, white; caudal rays, stippled. 



10mm 



PCR 



Figure 18.— Left lateral view of 

 the caudal complex of a 5.1 mm 

 ENL Xiphias gladius. Ha, 

 haemal arch; Hy, hypural; Nc, 

 notochord; Na, neural arch; Ph, 

 parhypural. Cartilage, stip- 

 pled. 



i 1 



0.25 mm 



Figure 19.— Left lateral view of the caudal 

 complex of a 8.8 mm ESL Xiphias gladius. 

 Hs, haemal spine; "Na", specialized neural 

 arch; Ns, neural spine; for other abbrevia- 

 tions, see Figures 17 and 18. Cartilage, 

 white; bone, stippled. 



PCR 



SCR 



Figure 20.— Left lateral view of the 

 caudal complex of a 12.6 mm ESL 

 Xiphias gladius. HPr, haemal 

 prezygapophysis; NPr, neural 

 prezygapophysis; for other abbrevia- 

 tions, see Figures 17-19. Cartilage, 

 white; ossifying, stippled. 



Table 1 1.— Length ranges at which parts of the caudal complex appear in cartilage and 

 ossify in 173 Xiphias gladius (5.4 mm ENL-225 mm ESL). Pu = preural centrum. 

 Brackets denote fusion of separate structures during development. 



17.2-267 

 131 -? 



17.2-226 



173 



