T)E\^ELOPMENT OF TtONIONEMA HURBACHII. 



Gonionernus : A.A^assiz, 1862. Contrib. Nat, Hist. U.S., 

 IV. , . p. 350. 



From y- CO V i angled, and h> rj a^ ol thread- 



"kneed tentacles". 

 Gonynema: Haeckel, 1S79. System der I'edusen. 

 Gonionemus : Murbach, lvS95, Journal Morph. , XI., 2 

 Gonionemus Murbachii : Mayer, 1901, Brooklyn Inst. Sci, , 



Bui. , Vol. I. , L. 

 Gonionema : A. A^assiz, mss. 

 Gonionema Murbachii . Perkins, J. H. Univ. Circ, May, 1902. 



INTRODUCTION, 



This genus was established by Dr. Alexander Agassiz 

 to include a medusa which he discovered in 1802 in the Gulf 

 of Georgia, V/ashington Territory, Its most striking char- 

 acter, anatomically, is t\\e peculiar form of the tentacles, 

 v/hich are bent at an angle near the tip, and at the angle 

 bear a sucking organ by means of v/hich the medusa makes it- 

 self fast to any favorable object. This peciilarity in tlie 

 form of the tentacle suggested to Agassiz the name which he 



