TraiiSiidioiis Sacicly Naz'ul .Ircliilccls and Marine linyinccrs, Vol. 26, i()i8. 



Plate 51 



Ti) ill list rule /laf^er on " Troyrcss in Tiirhiiic Shif> fro/^iilsinii, 

 hy I'riiiieis I loth/kiiisoii, Rsq., Visitor. 



