L.M.B.C. MEDUSA. 413 



large adult& which are plentiful in the bay during the 

 summer probably come from far off breeding grounds. 



Mr. Beaumont and I once dredged the scyphistoma- 

 stage near Bay Fine, August 1892 ; a few specimens on 

 an old Pecten shell. 



Family Pilemid^. 



Pilema octopus, (Linnaeus 15). 



Bliizostoma pulmo, Forbes {9). 



During April, 1894, several large specimens of this 

 medusa were taken. Three were left by the tide on the 

 beach. Prof. Weiss found one which measured 23 inches 

 in diameter, and had arms 15 inches in length. The margin 

 of the umbrella has a purplish border. On the external 

 side of the genital membrane many parasitic amphipods 

 {Hyperia galha) were found. This large medusa has been 

 recorded by Byerley. Mr. Walker states [7) that he has 

 seen many hundreds in a day. 



Eefeeences. 



1. Agassiz, A., 1865 ; "North American Acalephae." 



2. Agassiz, L., 1862; Monograph on Acalephas. Contrib. 



Nat. Hist., U.S. Vol. IV. 



3. Alder, J., 1861; Trans. Tynes. Field Club. Vol.V.,p.225. 



4. Allman,G. J.,1871; Bay S. "Mon. Gymn. Hydroids," 



5. Beaumont, W. I., 1893; Trans. Liverpool Biol. Soc. 



Vol. VII., p. 253; and "Fauna," Vol. IV. 



6. Byerley, J., 1853; Liverpool Literary and Philosophi- 



cal Soc. Vol. VIIL, p. 125. 



7. Clubb,J.A.,1886; Fauna of Liverp. Bay. Vol. L, p. 114. 



8. Crawford, J. H., 1891; Ann. Mag. Nat. Hist., Ser. 6. 



Vol. VIIL, p. 296. 



9. Forbes, E., 1848; " British Naked-Eyed Medusae." 

 10. Garner, 1867 ; " Holiday Excur. of a Naturahst," p. 82. 



