On the Possibility of Melanophore-Dispersing Activity in the Adenohypophysis of the Atlantic Hagfish,Myxine glutinosa

Extracts of adenohypophyses of Myxine glutinosa were tested on webs of Xenopus laevis with regard to melanophore-dispersing activity. In two out of five experiments pigment granule dispersion and aggregation were obtained when test webs were placed in extracts and saline solution, respectively. The possible occurrence and location of a melanophoredispersing substance is dicussed in view of previous investigations.