1896.] Embryology. 685 
Figure I. Right-hand portion of section through head of Amphiuma 78 millim- 
eters long, f, frontal; P, parietal; OSP, orbitosphenoid; E, eye; m, maxillary 
bone; mx*, branches of maxillary nerve; Tt, tentacular OTA rt, retractor 
bial mx, maxillary nerve. 
the section just as distinctly as it is shown in the figure, b is the blood 
vessel and the adjacent mx* the nerve which Kingsley thought I had 
mistaken for the tentacular apparatus, Tt. Notice that three branches 
of the ramus maxillaris course along the external sheath. 
= 
Figure II. Ce, canal for tentacle; rt, retractor muscle; ObD, orbital gland ; 
ITts, inner sheath ; ATts, outer sheath, 
