REVISION OF PORICHTHYS— HUBBS AND SCHULTZ 487 



PiGCUH 57. — Diagrams of the under side of the head and anterior portion of the body illiis. 

 trating the courses of the photopbores in : a, Nautopaedium porosissimum ; b, Porivhthys 

 myriaster ; c, P. greenei; d, P. margaritatus. 



