82 R. P. BIGELOW. 



antimere. These bag-like protrusions thus alternate with the 

 radii of the tentacles, and they contain the genital organs, the 

 specimen being a male. The marginal ring canal, or " festoon 

 canal," is very wide. It extends down the sides of the peronial 

 strand on either side of the insertion of each tentacle, and along 

 the margin of each lappet. It is thus broken up into 28 loops, 

 one in each antimere. 



The gelatinous substance of the bell is hyaline. The tenta- 

 cles, gonads, stomach, and festoon canal are milky slightly 

 brown in formalin. 



The medusa upon which this description is based is probably 

 immature ; for one half of its tentacles are of small size, and 

 belong apparently to a set that is in process of development. 



Locality. -- North Atlantic, U. S. S. " Fish Hawk" Station 

 No. 7068, near the border of the Gulf Stream, off the southern 

 coast of New England. 



