The Anatomy of Chlamydoselachus 



365 



t.ti. p.li. 



i. td. p. id 



Text'figure 31. 

 Surface and sectional views of a portion of the vertebral column (x 1.25) from the main 



caudal region of Chlamydoselachus. 

 A — Surface view showing ridged extensions of the arcualia around the notochord. 



bv., basiventral; ex., cyclospondylous centra; cfi.s., chordal sheath; h.s., haemal spine; i.bd., imperforate basi- 

 dorsal; i.id., imperforate interdorsal; >u., interventral; p.bd., perforate basidorsal; p.id., perforate interdorsal. 



After Goodey, 1910.1, Fig. 15, pi. XLIV. 



B — Vertical longitudinal section (with anterior and posterior ends reversed) showing 

 calcified cyclospondylous centra of two sizes. 



bi'., basiventral; h.c, haemal canal; h.s., haemal spine; I.c.c, larger cyclospondylous centrum; ne.c, neural canal; 



s.c.c, smaller cyclospondylous centrum. 

 After Goodey, 1910.1, Fig. 16, pi. XLIV. 



V(i.3o 



S.fl.l. 



u/. U 



rb, a..ch.s. 



Text-figure 32. 

 A portion of the vertebral column (x 1.5) from the trunk region of Chlamydoselachus. 



Note the rudimentary ribs. 



a.ch.s., annulation in the chordal sheath; bd., basidorsal; bu., basiventral; d.{., dorsal foramen; id., 



interdorsal; in., interventral; rb., rib; s.d.l., supradorsal hgament. 



After Goodey, 1910.1, Fig. 11, pi. XLIV. 



