IO2 



PISCES 



dfs. 1 ? 



nsp. r 



FIG. 62. 



Dissected tail of Lepidosteus. (After Kolliker.) d.f.s, dorsal fulcral scales ; h.ct, expanded 

 haemal arch ; h.f, hypochordal Jin ; n.sp, neural spine ; nt, upturned tip of the notochord ; r r 

 dorsal radial ; v.c, vertebral centrum ; v.f.s, ventral fulcral scales. The proximal ends of the 

 dermal rays have been cut off to expose the endoskeletou. 



nsp. pi. 



ef. " 



nt. 



Fio. 63. 



Dissected tail of Salmo. (After .Kolliker.) c, centrum of caudal vertebra ; .ef, epichordal 

 dermal ray ; A.a, haemal arch ; h.f t hypochordal fin ; hp, expanded haemal arch or hypural ; I, 

 dermal ray of opposite (right) side ; n.sp, neural spine ; nt, upturned extremity of the 

 notochord ; pi, covering bony plate (modified neural arch ?). 



