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ABBREVIATIONS 



Areg.T/i., thickenings at the angle where Ec.Th., 1, 2, 3, ectodermal thickenings 



the vertical lateral body wall be- lying in the region of and extending 



comes horizontal behind the first, second and third 



Aud. v., auditory vesicle true gills 



Con. 1, 2 and 3, contact of the endo- E.P.VII, epibranchial placode of VII 



dermic gill pocket of the first, sec- E.P.IX, epibranchial placode of IX 



ond and third true gills with the Epi., epiphysis 



ectoderm Gass., Gasserian ganglion 



D.L.VII, dorso-lateral VII ganglion G.VIL, general visceral portion of VII 



Ec.Th., ectodermal thickening in the Hy.Con., hyoid contact of ectoderm 



region of the gill contact and endoderm 



